425631406 has 4 divisors (see below), whose sum is σ = 638447112. Its totient is φ = 212815702.

The previous prime is 425631383. The next prime is 425631433. The reversal of 425631406 is 604136524.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106407850 + ... + 106407853.

It is an arithmetic number, because the mean of its divisors is an integer number (159611778).

Almost surely, 2^425631406 is an apocalyptic number.

425631406 is a deficient number, since it is larger than the sum of its proper divisors (212815706).

425631406 is a wasteful number, since it uses less digits than its factorization.

425631406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212815705.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 425631406 is about 20630.8362893994. The cubic root of 425631406 is about 752.2194439829.

The spelling of 425631406 in words is "four hundred twenty-five million, six hundred thirty-one thousand, four hundred six".