406442525 has 6 divisors (see below), whose sum is σ = 503988762. Its totient is φ = 325154000.

The previous prime is 406442507. The next prime is 406442527. The reversal of 406442525 is 525244604.

It can be written as a sum of positive squares in 3 ways, for example, as 9078169 + 397364356 = 3013^2 + 19934^2 .

It is not a de Polignac number, because 406442525 - 2²⁶ = 339333661 is a prime.

It is a super-2 number, since 2×406442525² = 330391052256751250, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 406442491 and 406442500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406442527) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8128826 + ... + 8128875.

It is an arithmetic number, because the mean of its divisors is an integer number (83998127).

Almost surely, 2^406442525 is an apocalyptic number.

It is an amenable number.

406442525 is a deficient number, since it is larger than the sum of its proper divisors (97546237).

406442525 is a wasteful number, since it uses less digits than its factorization.

406442525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16257711 (or 16257706 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 32.

The square root of 406442525 is about 20160.4197624950. The cubic root of 406442525 is about 740.7409944312.

The spelling of 406442525 in words is "four hundred six million, four hundred forty-two thousand, five hundred twenty-five".