70172505 has 24 divisors (see below), whose sum is σ = 130989768. Its totient is φ = 34546176.

The previous prime is 70172497. The next prime is 70172507. The reversal of 70172505 is 50527107.

It can be written as a sum of positive squares in 4 ways, for example, as 9659664 + 60512841 = 3108^2 + 7779^2 .

It is not a de Polignac number, because 70172505 - 2³ = 70172497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (70172507) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 59392 + ... + 60561.

It is an arithmetic number, because the mean of its divisors is an integer number (5457907).

Almost surely, 2^70172505 is an apocalyptic number.

It is an amenable number.

70172505 is a deficient number, since it is larger than the sum of its proper divisors (60817263).

70172505 is a wasteful number, since it uses less digits than its factorization.

70172505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119977 (or 119974 counting only the distinct ones).

The product of its (nonzero) digits is 2450, while the sum is 27.

The square root of 70172505 is about 8376.9030673633. The cubic root of 70172505 is about 412.4667962254.

The spelling of 70172505 in words is "seventy million, one hundred seventy-two thousand, five hundred five".