1243014653 has 4 divisors (see below), whose sum is σ = 1316133180. Its totient is φ = 1169896128.

The previous prime is 1243014649. The next prime is 1243014697. The reversal of 1243014653 is 3564103421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 794506969 + 448507684 = 28187^2 + 21178^2 .

It is a cyclic number.

It is not a de Polignac number, because 1243014653 - 2² = 1243014649 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1203014653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36559238 + ... + 36559271.

It is an arithmetic number, because the mean of its divisors is an integer number (329033295).

Almost surely, 2^1243014653 is an apocalyptic number.

It is an amenable number.

1243014653 is a deficient number, since it is larger than the sum of its proper divisors (73118527).

1243014653 is an equidigital number, since it uses as much as digits as its factorization.

1243014653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73118526.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 1243014653 is about 35256.4129343868. The cubic root of 1243014653 is about 1075.2069990422.

It can be divided in two parts, 124301465 and 3, that multiplied together give a triangular number (372904395 = T₂₇₃₀₉).

The spelling of 1243014653 in words is "one billion, two hundred forty-three million, fourteen thousand, six hundred fifty-three".