261303242 has 4 divisors (see below), whose sum is σ = 391954866. Its totient is φ = 130651620.

The previous prime is 261303233. The next prime is 261303269. The reversal of 261303242 is 242303162.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 254115481 + 7187761 = 15941^2 + 2681^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65325809 + ... + 65325812.

Almost surely, 2^261303242 is an apocalyptic number.

261303242 is a deficient number, since it is larger than the sum of its proper divisors (130651624).

261303242 is a wasteful number, since it uses less digits than its factorization.

261303242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130651623.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 261303242 is about 16164.8768012627. The cubic root of 261303242 is about 639.3150566066.

The spelling of 261303242 in words is "two hundred sixty-one million, three hundred three thousand, two hundred forty-two".