70251525 has 18 divisors (see below), whose sum is σ = 125828690. Its totient is φ = 37467360.

The previous prime is 70251523. The next prime is 70251529. The reversal of 70251525 is 52515207.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 7001316 + 63250209 = 2646^2 + 7953^2 .

It is not a de Polignac number, because 70251525 - 2¹ = 70251523 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70251521) by changing a digit.

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 17 ways as a sum of consecutive naturals, for example, 155890 + ... + 156339.

Almost surely, 2^70251525 is an apocalyptic number.

70251525 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

70251525 is a deficient number, since it is larger than the sum of its proper divisors (55577165).

70251525 is a wasteful number, since it uses less digits than its factorization.

70251525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312245 (or 312237 counting only the distinct ones).

The product of its (nonzero) digits is 3500, while the sum is 27.

The square root of 70251525 is about 8381.6182804993. The cubic root of 70251525 is about 412.6215619688.

The spelling of 70251525 in words is "seventy million, two hundred fifty-one thousand, five hundred twenty-five".