375721261 has 4 divisors (see below), whose sum is σ = 392056992. Its totient is φ = 359385532.

The previous prime is 375721217. The next prime is 375721289. The reversal of 375721261 is 162127573.

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 a cyclic number.

It is not a de Polignac number, because 375721261 - 2⁹ = 375720749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (375721211) 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, 8167831 + ... + 8167876.

It is an arithmetic number, because the mean of its divisors is an integer number (98014248).

Almost surely, 2^375721261 is an apocalyptic number.

It is an amenable number.

375721261 is a deficient number, since it is larger than the sum of its proper divisors (16335731).

375721261 is a wasteful number, since it uses less digits than its factorization.

375721261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16335730.

The product of its digits is 17640, while the sum is 34.

The square root of 375721261 is about 19383.5306639425. The cubic root of 375721261 is about 721.5868172250.

The spelling of 375721261 in words is "three hundred seventy-five million, seven hundred twenty-one thousand, two hundred sixty-one".