754465721 has 4 divisors (see below), whose sum is σ = 764016000. Its totient is φ = 744915444.

The previous prime is 754465717. The next prime is 754465771. The reversal of 754465721 is 127564457.

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: 127564457 = 113 ⋅1128889.

It is a cyclic number.

It is not a de Polignac number, because 754465721 - 2² = 754465717 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (754465771) 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, 4775021 + ... + 4775178.

It is an arithmetic number, because the mean of its divisors is an integer number (191004000).

Almost surely, 2^754465721 is an apocalyptic number.

It is an amenable number.

754465721 is a deficient number, since it is larger than the sum of its proper divisors (9550279).

754465721 is an equidigital number, since it uses as much as digits as its factorization.

754465721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9550278.

The product of its digits is 235200, while the sum is 41.

The square root of 754465721 is about 27467.5394056330. The cubic root of 754465721 is about 910.3600077004.

The spelling of 754465721 in words is "seven hundred fifty-four million, four hundred sixty-five thousand, seven hundred twenty-one".