1025431256 has 24 divisors (see below), whose sum is σ = 1932348780. Its totient is φ = 510144768.

The previous prime is 1025431247. The next prime is 1025431259. The reversal of 1025431256 is 6521345201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1025431259) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1523336 + ... + 1524008.

Almost surely, 2^1025431256 is an apocalyptic number.

It is an amenable number.

1025431256 is a deficient number, since it is larger than the sum of its proper divisors (906917524).

1025431256 is an frugal number, since it uses more digits than its factorization.

1025431256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1635 (or 958 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 1025431256 is about 32022.3555660729. The cubic root of 1025431256 is about 1008.4062227451.

Adding to 1025431256 its reverse (6521345201), we get a palindrome (7546776457).

The spelling of 1025431256 in words is "one billion, twenty-five million, four hundred thirty-one thousand, two hundred fifty-six".