70521243 has 32 divisors (see below), whose sum is σ = 109347840. Its totient is φ = 40064640.

The previous prime is 70521229. The next prime is 70521251. The reversal of 70521243 is 34212507.

It is not a de Polignac number, because 70521243 - 2⁸ = 70520987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (70521263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24658 + ... + 27368.

It is an arithmetic number, because the mean of its divisors is an integer number (3417120).

Almost surely, 2^70521243 is an apocalyptic number.

70521243 is a deficient number, since it is larger than the sum of its proper divisors (38826597).

70521243 is a wasteful number, since it uses less digits than its factorization.

70521243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2779.

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 70521243 is about 8397.6927188365. The cubic root of 70521243 is about 413.1489495127.

The spelling of 70521243 in words is "seventy million, five hundred twenty-one thousand, two hundred forty-three".