7477421 has 4 divisors (see below), whose sum is σ = 8545632. Its totient is φ = 6409212.

The previous prime is 7477409. The next prime is 7477427. The reversal of 7477421 is 1247747.

7477421 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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: 1247747 = 283 ⋅4409.

It is a cyclic number.

It is not a de Polignac number, because 7477421 - 2⁶ = 7477357 is a prime.

It is a super-2 number, since 2×7477421² = 111823649622482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7477427) 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 3 ways as a sum of consecutive naturals, for example, 534095 + ... + 534108.

It is an arithmetic number, because the mean of its divisors is an integer number (2136408).

Almost surely, 2^7477421 is an apocalyptic number.

It is an amenable number.

7477421 is a deficient number, since it is larger than the sum of its proper divisors (1068211).

7477421 is a wasteful number, since it uses less digits than its factorization.

7477421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1068210.

The product of its digits is 10976, while the sum is 32.

The square root of 7477421 is about 2734.4873376924. The cubic root of 7477421 is about 195.5467539489.

The spelling of 7477421 in words is "seven million, four hundred seventy-seven thousand, four hundred twenty-one".