7021157 has 16 divisors (see below), whose sum is σ = 8477952. Its totient is φ = 5728320.

The previous prime is 7021139. The next prime is 7021163. The reversal of 7021157 is 7511207.

It is a happy number.

It is not a de Polignac number, because 7021157 - 2⁸ = 7020901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7021117) 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 15 ways as a sum of consecutive naturals, for example, 4628 + ... + 5954.

It is an arithmetic number, because the mean of its divisors is an integer number (529872).

Almost surely, 2^7021157 is an apocalyptic number.

It is an amenable number.

7021157 is a deficient number, since it is larger than the sum of its proper divisors (1456795).

7021157 is a wasteful number, since it uses less digits than its factorization.

7021157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1388.

The product of its (nonzero) digits is 490, while the sum is 23.

The square root of 7021157 is about 2649.7465916574. The cubic root of 7021157 is about 191.4856477006.

The spelling of 7021157 in words is "seven million, twenty-one thousand, one hundred fifty-seven".