70644025 has 15 divisors (see below), whose sum is σ = 89788555. Its totient is φ = 55136800.

The previous prime is 70644023. The next prime is 70644047. The reversal of 70644025 is 52044607.

The square root of 70644025 is 8405.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 7 ways, for example, as 55308969 + 15335056 = 7437^2 + 3916^2 .

It is not a de Polignac number, because 70644025 - 2¹ = 70644023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 70643984 and 70644002.

It is not an unprimeable number, because it can be changed into a prime (70644023) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 1723005 + ... + 1723045.

Almost surely, 2^70644025 is an apocalyptic number.

70644025 is the 8405-th square number.

70644025 is the 4203-rd centered octagonal number.

It is an amenable number.

70644025 is a deficient number, since it is larger than the sum of its proper divisors (19144530).

70644025 is an frugal number, since it uses more digits than its factorization.

70644025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174 (or 46 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 28.

The cubic root of 70644025 is about 413.3885834197.

The spelling of 70644025 in words is "seventy million, six hundred forty-four thousand, twenty-five".