261004132 has 6 divisors (see below), whose sum is σ = 456757238. Its totient is φ = 130502064.

The previous prime is 261004103. The next prime is 261004151. The reversal of 261004132 is 231400162.

It can be written as a sum of positive squares in only one way, i.e., 207187236 + 53816896 = 14394^2 + 7336^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32625513 + ... + 32625520.

Almost surely, 2^261004132 is an apocalyptic number.

It is an amenable number.

261004132 is a deficient number, since it is larger than the sum of its proper divisors (195753106).

261004132 is a wasteful number, since it uses less digits than its factorization.

261004132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65251037 (or 65251035 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 261004132 is about 16155.6223030869. The cubic root of 261004132 is about 639.0710252711.

Adding to 261004132 its reverse (231400162), we get a palindrome (492404294).

The spelling of 261004132 in words is "two hundred sixty-one million, four thousand, one hundred thirty-two".