406420261525 has 24 divisors (see below), whose sum is σ = 506821306400. Its totient is φ = 323296142400.

The previous prime is 406420261517. The next prime is 406420261573. The reversal of 406420261525 is 525162024604.

It is a happy number.

It is not a de Polignac number, because 406420261525 - 2³ = 406420261517 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3071431 + ... + 3201019.

Almost surely, 2^406420261525 is an apocalyptic number.

It is an amenable number.

406420261525 is a deficient number, since it is larger than the sum of its proper divisors (100401044875).

406420261525 is a wasteful number, since it uses less digits than its factorization.

406420261525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130309 (or 130304 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 37.

The spelling of 406420261525 in words is "four hundred six billion, four hundred twenty million, two hundred sixty-one thousand, five hundred twenty-five".