70172545 has 4 divisors (see below), whose sum is σ = 84207060. Its totient is φ = 56138032.

The previous prime is 70172537. The next prime is 70172573. The reversal of 70172545 is 54527107.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15944049 + 54228496 = 3993^2 + 7364^2 .

It is a cyclic number.

It is not a de Polignac number, because 70172545 - 2³ = 70172537 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7017250 + ... + 7017259.

It is an arithmetic number, because the mean of its divisors is an integer number (21051765).

Almost surely, 2^70172545 is an apocalyptic number.

It is an amenable number.

70172545 is a deficient number, since it is larger than the sum of its proper divisors (14034515).

70172545 is a wasteful number, since it uses less digits than its factorization.

70172545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14034514.

The product of its (nonzero) digits is 9800, while the sum is 31.

The square root of 70172545 is about 8376.9054548801. The cubic root of 70172545 is about 412.4668745974.

The spelling of 70172545 in words is "seventy million, one hundred seventy-two thousand, five hundred forty-five".