261957946 has 8 divisors (see below), whose sum is σ = 393005844. Its totient is φ = 130956000.

The previous prime is 261957937. The next prime is 261957953. The reversal of 261957946 is 649759162.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 261954225 + 3721 = 16185^2 + 61^2 .

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 261957946.

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, 14766 + ... + 27238.

Almost surely, 2^261957946 is an apocalyptic number.

261957946 is a deficient number, since it is larger than the sum of its proper divisors (131047898).

261957946 is a wasteful number, since it uses less digits than its factorization.

261957946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22976.

The product of its digits is 816480, while the sum is 49.

The square root of 261957946 is about 16185.1149517079. The cubic root of 261957946 is about 639.8485530322.

The spelling of 261957946 in words is "two hundred sixty-one million, nine hundred fifty-seven thousand, nine hundred forty-six".