375721 has 4 divisors (see below), whose sum is σ = 378000. Its totient is φ = 373444.

The previous prime is 375709. The next prime is 375743. The reversal of 375721 is 127573.

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: 127573 = 193 ⋅661.

It is a cyclic number.

It is not a de Polignac number, because 375721 - 2⁷ = 375593 is a prime.

It is a Duffinian number.

375721 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (375761) 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, 871 + ... + 1228.

It is an arithmetic number, because the mean of its divisors is an integer number (94500).

2³⁷⁵⁷²¹ is an apocalyptic number.

It is an amenable number.

375721 is a deficient number, since it is larger than the sum of its proper divisors (2279).

375721 is a wasteful number, since it uses less digits than its factorization.

375721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2278.

The product of its digits is 1470, while the sum is 25.

The square root of 375721 is about 612.9608470367. The cubic root of 375721 is about 72.1586650138.

It can be divided in two parts, 37572 and 1, that added together give a palindrome (37573).

The spelling of 375721 in words is "three hundred seventy-five thousand, seven hundred twenty-one".