261742252 has 12 divisors (see below), whose sum is σ = 482156920. Its totient is φ = 123983136.

The previous prime is 261742241. The next prime is 261742289. The reversal of 261742252 is 252247162.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1721913 + ... + 1722064.

Almost surely, 2^261742252 is an apocalyptic number.

It is an amenable number.

261742252 is a deficient number, since it is larger than the sum of its proper divisors (220414668).

261742252 is a wasteful number, since it uses less digits than its factorization.

261742252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3444000 (or 3443998 counting only the distinct ones).

The product of its digits is 13440, while the sum is 31.

The square root of 261742252 is about 16178.4502348031. The cubic root of 261742252 is about 639.6728894796.

The spelling of 261742252 in words is "two hundred sixty-one million, seven hundred forty-two thousand, two hundred fifty-two".