70215245 has 4 divisors (see below), whose sum is σ = 84258300. Its totient is φ = 56172192.

The previous prime is 70215239. The next prime is 70215289. The reversal of 70215245 is 54251207.

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 8404201 + 61811044 = 2899^2 + 7862^2 .

It is a cyclic number.

It is not a de Polignac number, because 70215245 - 2⁶ = 70215181 is a prime.

It is a congruent 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, 7021520 + ... + 7021529.

It is an arithmetic number, because the mean of its divisors is an integer number (21064575).

Almost surely, 2^70215245 is an apocalyptic number.

It is an amenable number.

70215245 is a deficient number, since it is larger than the sum of its proper divisors (14043055).

70215245 is a wasteful number, since it uses less digits than its factorization.

70215245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14043054.

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 70215245 is about 8379.4537411457. The cubic root of 70215245 is about 412.5505196772.

The spelling of 70215245 in words is "seventy million, two hundred fifteen thousand, two hundred forty-five".