70621225 has 12 divisors (see below), whose sum is σ = 89007820. Its totient is φ = 55569600.

The previous prime is 70621223. The next prime is 70621241. The reversal of 70621225 is 52212607.

It can be written as a sum of positive squares in 6 ways, for example, as 5076009 + 65545216 = 2253^2 + 8096^2 .

It is not a de Polignac number, because 70621225 - 2¹ = 70621223 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 70621225.

It is not an unprimeable number, because it can be changed into a prime (70621223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21630 + ... + 24679.

Almost surely, 2^70621225 is an apocalyptic number.

It is an amenable number.

70621225 is a deficient number, since it is larger than the sum of its proper divisors (18386595).

70621225 is a wasteful number, since it uses less digits than its factorization.

70621225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46380 (or 46375 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 70621225 is about 8403.6435550302. The cubic root of 70621225 is about 413.3441056130.

The spelling of 70621225 in words is "seventy million, six hundred twenty-one thousand, two hundred twenty-five".