7490421 has 16 divisors (see below), whose sum is σ = 11750400. Its totient is φ = 4699584.

The previous prime is 7490419. The next prime is 7490423. The reversal of 7490421 is 1240947.

It is a happy number.

7490421 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (7490419) and next prime (7490423).

It is not a de Polignac number, because 7490421 - 2¹ = 7490419 is a prime.

It is a super-2 number, since 2×7490421² = 112212813514482, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

7490421 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7490423) 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, 7701 + ... + 8618.

It is an arithmetic number, because the mean of its divisors is an integer number (734400).

Almost surely, 2^7490421 is an apocalyptic number.

It is an amenable number.

7490421 is a deficient number, since it is larger than the sum of its proper divisors (4259979).

7490421 is a wasteful number, since it uses less digits than its factorization.

7490421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16345 (or 16339 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 7490421 is about 2736.8633506260. The cubic root of 7490421 is about 195.6600120725.

The spelling of 7490421 in words is "seven million, four hundred ninety thousand, four hundred twenty-one".