7150921 has 4 divisors (see below), whose sum is σ = 7171200. Its totient is φ = 7130644.

The previous prime is 7150873. The next prime is 7150961. The reversal of 7150921 is 1290517.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1290517 = 521 ⋅2477.

It is a cyclic number.

It is not a de Polignac number, because 7150921 - 2¹⁷ = 7019849 is a prime.

It is a super-2 number, since 2×7150921² = 102271342296482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7150961) 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, 9601 + ... + 10318.

It is an arithmetic number, because the mean of its divisors is an integer number (1792800).

Almost surely, 2^7150921 is an apocalyptic number.

It is an amenable number.

7150921 is a deficient number, since it is larger than the sum of its proper divisors (20279).

7150921 is a wasteful number, since it uses less digits than its factorization.

7150921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20278.

The product of its (nonzero) digits is 630, while the sum is 25.

The square root of 7150921 is about 2674.1206031142. The cubic root of 7150921 is about 192.6581238588.

The spelling of 7150921 in words is "seven million, one hundred fifty thousand, nine hundred twenty-one".