261593942 has 8 divisors (see below), whose sum is σ = 393400800. Its totient is φ = 130460344.

The previous prime is 261593923. The next prime is 261593953. The reversal of 261593942 is 249395162.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 261593942.

It is a congruent number.

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, 167342 + ... + 168897.

It is an arithmetic number, because the mean of its divisors is an integer number (49175100).

Almost surely, 2^261593942 is an apocalyptic number.

261593942 is a deficient number, since it is larger than the sum of its proper divisors (131806858).

261593942 is a wasteful number, since it uses less digits than its factorization.

261593942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336630.

The product of its digits is 116640, while the sum is 41.

The square root of 261593942 is about 16173.8660189826. The cubic root of 261593942 is about 639.5520481943.

The spelling of 261593942 in words is "two hundred sixty-one million, five hundred ninety-three thousand, nine hundred forty-two".