375561 has 6 divisors (see below), whose sum is σ = 542490. Its totient is φ = 250368.

The previous prime is 375559. The next prime is 375563. The reversal of 375561 is 165573.

It is an interprime number because it is at equal distance from previous prime (375559) and next prime (375563).

It can be written as a sum of positive squares in only one way, i.e., 230400 + 145161 = 480^2 + 381^2 .

It is not a de Polignac number, because 375561 - 2¹ = 375559 is a prime.

It is a super-3 number, since 3×375561³ = 158914203338050443, which contains 333 as substring.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 375561.

It is not an unprimeable number, because it can be changed into a prime (375563) 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, 20856 + ... + 20873.

It is an arithmetic number, because the mean of its divisors is an integer number (90415).

2³⁷⁵⁵⁶¹ is an apocalyptic number.

It is an amenable number.

375561 is a deficient number, since it is larger than the sum of its proper divisors (166929).

375561 is a wasteful number, since it uses less digits than its factorization.

375561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41735 (or 41732 counting only the distinct ones).

The product of its digits is 3150, while the sum is 27.

The square root of 375561 is about 612.8303190933. The cubic root of 375561 is about 72.1484206874.

The spelling of 375561 in words is "three hundred seventy-five thousand, five hundred sixty-one".