406991425 has 12 divisors (see below), whose sum is σ = 511584940. Its totient is φ = 321131520.

The previous prime is 406991369. The next prime is 406991437. The reversal of 406991425 is 524199604.

It can be written as a sum of positive squares in 6 ways, for example, as 25492401 + 381499024 = 5049^2 + 19532^2 .

It is not a de Polignac number, because 406991425 - 2¹³ = 406983233 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 109680 + ... + 113329.

Almost surely, 2^406991425 is an apocalyptic number.

It is an amenable number.

406991425 is a deficient number, since it is larger than the sum of its proper divisors (104593515).

406991425 is a wasteful number, since it uses less digits than its factorization.

406991425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223092 (or 223087 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 406991425 is about 20174.0284772278. The cubic root of 406991425 is about 741.0743009545.

It can be divided in two parts, 40699 and 1425, that added together give a palindrome (42124).

The spelling of 406991425 in words is "four hundred six million, nine hundred ninety-one thousand, four hundred twenty-five".