61281132 has 24 divisors (see below), whose sum is σ = 155988672. Its totient is φ = 18570000.

The previous prime is 61281127. The next prime is 61281133. The reversal of 61281132 is 23118216.

It is not an unprimeable number, because it can be changed into a prime (61281133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 231994 + ... + 232257.

It is an arithmetic number, because the mean of its divisors is an integer number (6499528).

Almost surely, 2^61281132 is an apocalyptic number.

It is an amenable number.

61281132 is an abundant number, since it is smaller than the sum of its proper divisors (94707540).

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

61281132 is a wasteful number, since it uses less digits than its factorization.

61281132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464269 (or 464267 counting only the distinct ones).

The product of its digits is 576, while the sum is 24.

The square root of 61281132 is about 7828.2266191009. The cubic root of 61281132 is about 394.2535322700.

Adding to 61281132 its reverse (23118216), we get a palindrome (84399348).

It can be divided in two parts, 6128 and 1132, that added together give a triangular number (7260 = T₁₂₀).

The spelling of 61281132 in words is "sixty-one million, two hundred eighty-one thousand, one hundred thirty-two".