261496946 has 4 divisors (see below), whose sum is σ = 392245422. Its totient is φ = 130748472.

The previous prime is 261496931. The next prime is 261496987. The reversal of 261496946 is 649694162.

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., 209815225 + 51681721 = 14485^2 + 7189^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 261496946.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65374235 + ... + 65374238.

Almost surely, 2^261496946 is an apocalyptic number.

261496946 is a deficient number, since it is larger than the sum of its proper divisors (130748476).

261496946 is a wasteful number, since it uses less digits than its factorization.

261496946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130748475.

The product of its digits is 559872, while the sum is 47.

The square root of 261496946 is about 16170.8671999989. The cubic root of 261496946 is about 639.4729922616.

The spelling of 261496946 in words is "two hundred sixty-one million, four hundred ninety-six thousand, nine hundred forty-six".