425123431 has 2 divisors, whose sum is σ = 425123432. Its totient is φ = 425123430.

The previous prime is 425123399. The next prime is 425123473. The reversal of 425123431 is 134321524.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 425123431 - 2⁵ = 425123399 is a prime.

It is a super-2 number, since 2×425123431² = 361459863170423522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 425123396 and 425123405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (425126431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212561715 + 212561716.

It is an arithmetic number, because the mean of its divisors is an integer number (212561716).

Almost surely, 2^425123431 is an apocalyptic number.

425123431 is a deficient number, since it is larger than the sum of its proper divisors (1).

425123431 is an equidigital number, since it uses as much as digits as its factorization.

425123431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 25.

The square root of 425123431 is about 20618.5215522355. The cubic root of 425123431 is about 751.9200763624.

Adding to 425123431 its reverse (134321524), we get a palindrome (559444955).

The spelling of 425123431 in words is "four hundred twenty-five million, one hundred twenty-three thousand, four hundred thirty-one".