1042400431 has 2 divisors, whose sum is σ = 1042400432. Its totient is φ = 1042400430.

The previous prime is 1042400419. The next prime is 1042400459. The reversal of 1042400431 is 1340042401.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1042400431 - 2⁵ = 1042400399 is a prime.

It is a super-2 number, since 2×1042400431² = 2173197317097971522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1042400399 and 1042400408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1042400461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 521200215 + 521200216.

It is an arithmetic number, because the mean of its divisors is an integer number (521200216).

Almost surely, 2^1042400431 is an apocalyptic number.

1042400431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1042400431 is an equidigital number, since it uses as much as digits as its factorization.

1042400431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1042400431 is about 32286.2266454289. The cubic root of 1042400431 is about 1013.9382982165.

Adding to 1042400431 its reverse (1340042401), we get a palindrome (2382442832).

The spelling of 1042400431 in words is "one billion, forty-two million, four hundred thousand, four hundred thirty-one".