70645 has 8 divisors (see below), whose sum is σ = 86400. Its totient is φ = 55440.

The previous prime is 70639. The next prime is 70657. The reversal of 70645 is 54607.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 70645 - 2¹¹ = 68597 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 256 + ... + 454.

It is an arithmetic number, because the mean of its divisors is an integer number (10800).

2⁷⁰⁶⁴⁵ is an apocalyptic number.

It is an amenable number.

70645 is a deficient number, since it is larger than the sum of its proper divisors (15755).

70645 is a wasteful number, since it uses less digits than its factorization.

70645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 70645 is about 265.7912714895. The cubic root of 70645 is about 41.3390485218.

It can be divided in two parts, 70 and 645, that multiplied together give a triangular number (45150 = T₃₀₀).

The spelling of 70645 in words is "seventy thousand, six hundred forty-five".