405502025 has 6 divisors (see below), whose sum is σ = 502822542. Its totient is φ = 324401600.

The previous prime is 405502007. The next prime is 405502033. The reversal of 405502025 is 520205504.

It can be written as a sum of positive squares in 3 ways, for example, as 116229961 + 289272064 = 10781^2 + 17008^2 .

It is not a de Polignac number, because 405502025 - 2⁶ = 405501961 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8110016 + ... + 8110065.

It is an arithmetic number, because the mean of its divisors is an integer number (83803757).

Almost surely, 2^405502025 is an apocalyptic number.

It is an amenable number.

405502025 is a deficient number, since it is larger than the sum of its proper divisors (97320517).

405502025 is a wasteful number, since it uses less digits than its factorization.

405502025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16220091 (or 16220086 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 23.

The square root of 405502025 is about 20137.0808460412. The cubic root of 405502025 is about 740.1691998050.

Adding to 405502025 its reverse (520205504), we get a palindrome (925707529).

The spelling of 405502025 in words is "four hundred five million, five hundred two thousand, twenty-five".