261139302 has 20 divisors (see below), whose sum is σ = 585145836. Its totient is φ = 87046380.

The previous prime is 261139289. The next prime is 261139339. The reversal of 261139302 is 203931162.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 805824 + ... + 806147.

Almost surely, 2^261139302 is an apocalyptic number.

261139302 is an abundant number, since it is smaller than the sum of its proper divisors (324006534).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261139302 is a wasteful number, since it uses less digits than its factorization.

261139302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1611985 (or 1611976 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 261139302 is about 16159.8051349637. The cubic root of 261139302 is about 639.1813278960.

The spelling of 261139302 in words is "two hundred sixty-one million, one hundred thirty-nine thousand, three hundred two".