1025400431 has 4 divisors (see below), whose sum is σ = 1118618664. Its totient is φ = 932182200.

The previous prime is 1025400427. The next prime is 1025400433. The reversal of 1025400431 is 1340045201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1340045201 = 11 ⋅121822291.

It is a cyclic number.

It is not a de Polignac number, because 1025400431 - 2² = 1025400427 is a prime.

It is a super-2 number, since 2×1025400431² = 2102892087789971522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1025400433) 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, 46609100 + ... + 46609121.

It is an arithmetic number, because the mean of its divisors is an integer number (279654666).

Almost surely, 2^1025400431 is an apocalyptic number.

1025400431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1025400431 is a deficient number, since it is larger than the sum of its proper divisors (93218233).

1025400431 is an equidigital number, since it uses as much as digits as its factorization.

1025400431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93218232.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1025400431 is about 32021.8742580755. The cubic root of 1025400431 is about 1008.3961182376.

Adding to 1025400431 its reverse (1340045201), we get a palindrome (2365445632).

The spelling of 1025400431 in words is "one billion, twenty-five million, four hundred thousand, four hundred thirty-one".