61156270 has 32 divisors (see below), whose sum is σ = 127411200. Its totient is φ = 20700576.

The previous prime is 61156253. The next prime is 61156279. The reversal of 61156270 is 7265116.

61156270 is a nontrivial binomial coefficient, being equal to C(11060, 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61156279) 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, 1 + ... + 11059.

It is an arithmetic number, because the mean of its divisors is an integer number (3981600).

Almost surely, 2^61156270 is an apocalyptic number.

61156270 is the 11059-th triangular number and also the 5530-th hexagonal number.

61156270 is the 3687-th centered nonagonal number.

61156270 is an abundant number, since it is smaller than the sum of its proper divisors (66254930).

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

61156270 is a wasteful number, since it uses less digits than its factorization.

61156270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11152.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 61156270 is about 7820.2474385405. The cubic root of 61156270 is about 393.9855827134.

The spelling of 61156270 in words is "sixty-one million, one hundred fifty-six thousand, two hundred seventy".