1240000453 has 4 divisors (see below), whose sum is σ = 1244413548. Its totient is φ = 1235587360.

The previous prime is 1240000429. The next prime is 1240000469. The reversal of 1240000453 is 3540000421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3540000421 = 53087 ⋅66683.

It can be written as a sum of positive squares in 2 ways, for example, as 912462849 + 327537604 = 30207^2 + 18098^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1240000453 is a prime.

It is a super-2 number, since 2×1240000453² = 3075202246880410418, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1240000453.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240001453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2206126 + ... + 2206687.

It is an arithmetic number, because the mean of its divisors is an integer number (311103387).

Almost surely, 2^1240000453 is an apocalyptic number.

It is an amenable number.

1240000453 is a deficient number, since it is larger than the sum of its proper divisors (4413095).

1240000453 is an equidigital number, since it uses as much as digits as its factorization.

1240000453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4413094.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 1240000453 is about 35213.6401554852. The cubic root of 1240000453 is about 1074.3372018155.

Adding to 1240000453 its reverse (3540000421), we get a palindrome (4780000874).

The spelling of 1240000453 in words is "one billion, two hundred forty million, four hundred fifty-three", and thus it is an aban number.