7137021 has 4 divisors (see below), whose sum is σ = 9516032. Its totient is φ = 4758012.

The previous prime is 7137001. The next prime is 7137029. The reversal of 7137021 is 1207317.

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 not a de Polignac number, because 7137021 - 2¹¹ = 7134973 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 (7137029) 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, 1189501 + ... + 1189506.

It is an arithmetic number, because the mean of its divisors is an integer number (2379008).

Almost surely, 2^7137021 is an apocalyptic number.

It is an amenable number.

7137021 is a deficient number, since it is larger than the sum of its proper divisors (2379011).

7137021 is a wasteful number, since it uses less digits than its factorization.

7137021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2379010.

The product of its (nonzero) digits is 294, while the sum is 21.

The square root of 7137021 is about 2671.5203536563. The cubic root of 7137021 is about 192.5332129121.

The spelling of 7137021 in words is "seven million, one hundred thirty-seven thousand, twenty-one".