70230921 has 16 divisors (see below), whose sum is σ = 97401600. Its totient is φ = 44972928.

The previous prime is 70230917. The next prime is 70230949. The reversal of 70230921 is 12903207.

It is not a de Polignac number, because 70230921 - 2² = 70230917 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 70230891 and 70230900.

It is not an unprimeable number, because it can be changed into a prime (70230421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4765 + ... + 12773.

It is an arithmetic number, because the mean of its divisors is an integer number (6087600).

Almost surely, 2^70230921 is an apocalyptic number.

It is an amenable number.

70230921 is a deficient number, since it is larger than the sum of its proper divisors (27170679).

70230921 is a wasteful number, since it uses less digits than its factorization.

70230921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8128.

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 70230921 is about 8380.3890721135. The cubic root of 70230921 is about 412.5812189018.

The spelling of 70230921 in words is "seventy million, two hundred thirty thousand, nine hundred twenty-one".