70521427 has 8 divisors (see below), whose sum is σ = 73831680. Its totient is φ = 67231560.

The previous prime is 70521413. The next prime is 70521439. The reversal of 70521427 is 72412507.

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

It is a cyclic number.

It is not a de Polignac number, because 70521427 - 2¹⁵ = 70488659 is a prime.

It is a super-2 number, since 2×70521427² = 9946543332232658, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 70521395 and 70521404.

It is not an unprimeable number, because it can be changed into a prime (70521467) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2224 + ... + 12082.

It is an arithmetic number, because the mean of its divisors is an integer number (9228960).

Almost surely, 2^70521427 is an apocalyptic number.

70521427 is a deficient number, since it is larger than the sum of its proper divisors (3310253).

70521427 is a wasteful number, since it uses less digits than its factorization.

70521427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10193.

The product of its (nonzero) digits is 3920, while the sum is 28.

The square root of 70521427 is about 8397.7036742195. The cubic root of 70521427 is about 413.1493088339.

The spelling of 70521427 in words is "seventy million, five hundred twenty-one thousand, four hundred twenty-seven".