870975421 has 4 divisors (see below), whose sum is σ = 872501344. Its totient is φ = 869449500.

The previous prime is 870975407. The next prime is 870975437. The reversal of 870975421 is 124579078.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 870975421 - 2¹⁷ = 870844349 is a prime.

It is a super-2 number, since 2×870975421² = 1517196367972254482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (870975401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 762105 + ... + 763246.

It is an arithmetic number, because the mean of its divisors is an integer number (218125336).

Almost surely, 2^870975421 is an apocalyptic number.

It is an amenable number.

870975421 is a deficient number, since it is larger than the sum of its proper divisors (1525923).

870975421 is a wasteful number, since it uses less digits than its factorization.

870975421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1525922.

The product of its (nonzero) digits is 141120, while the sum is 43.

The square root of 870975421 is about 29512.2927099878. The cubic root of 870975421 is about 954.9969101624.

The spelling of 870975421 in words is "eight hundred seventy million, nine hundred seventy-five thousand, four hundred twenty-one".