261235252 has 6 divisors (see below), whose sum is σ = 457161698. Its totient is φ = 130617624.

The previous prime is 261235223. The next prime is 261235267. The reversal of 261235252 is 252532162.

It can be written as a sum of positive squares in only one way, i.e., 260305956 + 929296 = 16134^2 + 964^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 261235252.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32654403 + ... + 32654410.

Almost surely, 2^261235252 is an apocalyptic number.

It is an amenable number.

261235252 is a deficient number, since it is larger than the sum of its proper divisors (195926446).

261235252 is a wasteful number, since it uses less digits than its factorization.

261235252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65308817 (or 65308815 counting only the distinct ones).

The product of its digits is 7200, while the sum is 28.

The square root of 261235252 is about 16162.7736481088. The cubic root of 261235252 is about 639.2596027708.

It can be divided in two parts, 26123 and 5252, that added together give a triangular number (31375 = T₂₅₀).

The spelling of 261235252 in words is "two hundred sixty-one million, two hundred thirty-five thousand, two hundred fifty-two".