752421 has 4 divisors (see below), whose sum is σ = 1003232. Its totient is φ = 501612.

The previous prime is 752413. The next prime is 752431. The reversal of 752421 is 124257.

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.

It is not a de Polignac number, because 752421 - 2³ = 752413 is a prime.

It is a super-2 number, since 2×752421² = 1132274722482, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (752431) 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, 125401 + ... + 125406.

It is an arithmetic number, because the mean of its divisors is an integer number (250808).

2⁷⁵²⁴²¹ is an apocalyptic number.

It is an amenable number.

752421 is a deficient number, since it is larger than the sum of its proper divisors (250811).

752421 is a wasteful number, since it uses less digits than its factorization.

752421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250810.

The product of its digits is 560, while the sum is 21.

The square root of 752421 is about 867.4220426067. The cubic root of 752421 is about 90.9536857268.

Adding to 752421 its reverse (124257), we get a palindrome (876678).

The spelling of 752421 in words is "seven hundred fifty-two thousand, four hundred twenty-one".