61131270 has 16 divisors (see below), whose sum is σ = 146715120. Its totient is φ = 16301664.

The previous prime is 61131241. The next prime is 61131319. The reversal of 61131270 is 7213116.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1018825 + ... + 1018884.

It is an arithmetic number, because the mean of its divisors is an integer number (9169695).

Almost surely, 2^61131270 is an apocalyptic number.

61131270 is an abundant number, since it is smaller than the sum of its proper divisors (85583850).

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

61131270 is a wasteful number, since it uses less digits than its factorization.

61131270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2037719.

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 61131270 is about 7818.6488602571. The cubic root of 61131270 is about 393.9318897614.

Adding to 61131270 its reverse (7213116), we get a palindrome (68344386).

The spelling of 61131270 in words is "sixty-one million, one hundred thirty-one thousand, two hundred seventy".