7490021 has 24 divisors (see below), whose sum is σ = 9703680. Its totient is φ = 5654880.

The previous prime is 7489987. The next prime is 7490023. The reversal of 7490021 is 1200947.

It is not a de Polignac number, because 7490021 - 2⁶ = 7489957 is a prime.

It is a super-2 number, since 2×7490021² = 112200829160882, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7490023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31220 + ... + 31458.

It is an arithmetic number, because the mean of its divisors is an integer number (404320).

Almost surely, 2^7490021 is an apocalyptic number.

It is an amenable number.

7490021 is a deficient number, since it is larger than the sum of its proper divisors (2213659).

7490021 is a wasteful number, since it uses less digits than its factorization.

7490021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305 (or 294 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 7490021 is about 2736.7902732946. The cubic root of 7490021 is about 195.6565291620.

Adding to 7490021 its reverse (1200947), we get a palindrome (8690968).

The spelling of 7490021 in words is "seven million, four hundred ninety thousand, twenty-one".