261545132 has 12 divisors (see below), whose sum is σ = 458190936. Its totient is φ = 130633440.

The previous prime is 261545071. The next prime is 261545143. The reversal of 261545132 is 231545162.

It is a junction number, because it is equal to n+sod(n) for n = 261545095 and 261545104.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30494 + ... + 38117.

It is an arithmetic number, because the mean of its divisors is an integer number (38182578).

Almost surely, 2^261545132 is an apocalyptic number.

It is an amenable number.

261545132 is a deficient number, since it is larger than the sum of its proper divisors (196645804).

261545132 is a wasteful number, since it uses less digits than its factorization.

261545132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69568 (or 69566 counting only the distinct ones).

The product of its digits is 7200, while the sum is 29.

The square root of 261545132 is about 16172.3570329127. The cubic root of 261545132 is about 639.5122683775.

The spelling of 261545132 in words is "two hundred sixty-one million, five hundred forty-five thousand, one hundred thirty-two".