1401245531 has 4 divisors (see below), whose sum is σ = 1601423472. Its totient is φ = 1201067592.

The previous prime is 1401245501. The next prime is 1401245543. The reversal of 1401245531 is 1355421041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1355421041 = 13 ⋅104263157.

It is a cyclic number.

It is not a de Polignac number, because 1401245531 - 2²⁶ = 1334136667 is a prime.

It is a super-2 number, since 2×1401245531² = 3926978076294943922, 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 1401245531.

It is not an unprimeable number, because it can be changed into a prime (1401245501) 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, 100088960 + ... + 100088973.

It is an arithmetic number, because the mean of its divisors is an integer number (400355868).

Almost surely, 2^1401245531 is an apocalyptic number.

1401245531 is a deficient number, since it is larger than the sum of its proper divisors (200177941).

1401245531 is an equidigital number, since it uses as much as digits as its factorization.

1401245531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200177940.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 1401245531 is about 37433.2142755601. The cubic root of 1401245531 is about 1119.0205965463.

Adding to 1401245531 its reverse (1355421041), we get a palindrome (2756666572).

The spelling of 1401245531 in words is "one billion, four hundred one million, two hundred forty-five thousand, five hundred thirty-one".