7408365121 has 4 divisors (see below), whose sum is σ = 7416775044. Its totient is φ = 7399955200.

The previous prime is 7408365119. The next prime is 7408365157. The reversal of 7408365121 is 1215638047.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4075034896 + 3333330225 = 63836^2 + 57735^2 .

It is a cyclic number.

It is not a de Polignac number, because 7408365121 - 2¹ = 7408365119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7408365191) 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, 4203640 + ... + 4205401.

It is an arithmetic number, because the mean of its divisors is an integer number (1854193761).

Almost surely, 2^7408365121 is an apocalyptic number.

It is an amenable number.

7408365121 is a deficient number, since it is larger than the sum of its proper divisors (8409923).

7408365121 is an equidigital number, since it uses as much as digits as its factorization.

7408365121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8409922.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 7408365121 is about 86071.8602157523. The cubic root of 7408365121 is about 1949.4291663342.

The spelling of 7408365121 in words is "seven billion, four hundred eight million, three hundred sixty-five thousand, one hundred twenty-one".