261372 has 24 divisors (see below), whose sum is σ = 637056. Its totient is φ = 83248.

The previous prime is 261353. The next prime is 261379. The reversal of 261372 is 273162.

It is a happy number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261379) by changing a digit.

261372 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198 + ... + 749.

It is an arithmetic number, because the mean of its divisors is an integer number (26544).

2²⁶¹³⁷² is an apocalyptic number.

It is an amenable number.

261372 is an abundant number, since it is smaller than the sum of its proper divisors (375684).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261372 is a wasteful number, since it uses less digits than its factorization.

261372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 977 (or 975 counting only the distinct ones).

The product of its digits is 504, while the sum is 21.

The square root of 261372 is about 511.2455378778. The cubic root of 261372 is about 63.9371127055.

The spelling of 261372 in words is "two hundred sixty-one thousand, three hundred seventy-two".