1291003025431 has 32 divisors (see below), whose sum is σ = 1518446182400. Its totient is φ = 1097102216448.

The previous prime is 1291003025399. The next prime is 1291003025443. The reversal of 1291003025431 is 1345203001921.

It is not a de Polignac number, because 1291003025431 - 2⁵ = 1291003025399 is a prime.

It is a super-2 number, since 2×1291003025431² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1291003025393 and 1291003025402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1291003065431) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 68250631 + ... + 68269543.

It is an arithmetic number, because the mean of its divisors is an integer number (47451443200).

Almost surely, 2^{1291003025431} is an apocalyptic number.

1291003025431 is a deficient number, since it is larger than the sum of its proper divisors (227443156969).

1291003025431 is a wasteful number, since it uses less digits than its factorization.

1291003025431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20628 (or 20614 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The spelling of 1291003025431 in words is "one trillion, two hundred ninety-one billion, three million, twenty-five thousand, four hundred thirty-one".