4015625 has 14 divisors (see below), whose sum is σ = 5038998. Its totient is φ = 3200000.

The previous prime is 4015619. The next prime is 4015637. The reversal of 4015625 is 5265104.

It can be written as a sum of positive squares in 7 ways, for example, as 3671056 + 344569 = 1916^2 + 587^2 .

It is not a de Polignac number, because 4015625 - 2¹² = 4011529 is a prime.

It is a super-2 number, since 2×4015625² = 32250488281250, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4015625.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 15497 + ... + 15753.

Almost surely, 2^4015625 is an apocalyptic number.

It is an amenable number.

4015625 is a deficient number, since it is larger than the sum of its proper divisors (1023373).

4015625 is an frugal number, since it uses more digits than its factorization.

4015625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287 (or 262 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 4015625 is about 2003.9024427352. The cubic root of 4015625 is about 158.9465294934.

The spelling of 4015625 in words is "four million, fifteen thousand, six hundred twenty-five".