7465721 has 6 divisors (see below), whose sum is σ = 7577466. Its totient is φ = 7355600.

The previous prime is 7465697. The next prime is 7465723. The reversal of 7465721 is 1275647.

It can be written as a sum of positive squares in only one way, i.e., 6175225 + 1290496 = 2485^2 + 1136^2 .

It is not a de Polignac number, because 7465721 - 2⁶ = 7465657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7465723) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4301 + ... + 5781.

It is an arithmetic number, because the mean of its divisors is an integer number (1262911).

Almost surely, 2^7465721 is an apocalyptic number.

7465721 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

It is an amenable number.

7465721 is a deficient number, since it is larger than the sum of its proper divisors (111745).

7465721 is an equidigital number, since it uses as much as digits as its factorization.

7465721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1623 (or 1552 counting only the distinct ones).

The product of its digits is 11760, while the sum is 32.

The square root of 7465721 is about 2732.3471594949. The cubic root of 7465721 is about 195.4447093465. Note that the first 3 decimals are identical.

The spelling of 7465721 in words is "seven million, four hundred sixty-five thousand, seven hundred twenty-one".