61261530 has 32 divisors (see below), whose sum is σ = 160394688. Its totient is φ = 14851200.

The previous prime is 61261513. The next prime is 61261537. The reversal of 61261530 is 3516216.

It is a self number, because there is not a number n which added to its sum of digits gives 61261530.

It is not an unprimeable number, because it can be changed into a prime (61261537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92491 + ... + 93150.

It is an arithmetic number, because the mean of its divisors is an integer number (5012334).

Almost surely, 2^61261530 is an apocalyptic number.

61261530 is an abundant number, since it is smaller than the sum of its proper divisors (99133158).

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

61261530 is a wasteful number, since it uses less digits than its factorization.

61261530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185662.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 61261530 is about 7826.9745112655. The cubic root of 61261530 is about 394.2114911521.

Adding to 61261530 its reverse (3516216), we get a palindrome (64777746).

The spelling of 61261530 in words is "sixty-one million, two hundred sixty-one thousand, five hundred thirty".