61191270 has 192 divisors, whose sum is σ = 196245504. Its totient is φ = 12925440.

The previous prime is 61191259. The next prime is 61191271. The reversal of 61191270 is 7219116.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61191271) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 594039 + ... + 594141.

It is an arithmetic number, because the mean of its divisors is an integer number (1022112).

Almost surely, 2^61191270 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61191270, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98122752).

61191270 is an abundant number, since it is smaller than the sum of its proper divisors (135054234).

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

61191270 is a wasteful number, since it uses less digits than its factorization.

61191270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187 (or 184 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 27.

The square root of 61191270 is about 7822.4848993143. The cubic root of 61191270 is about 394.0607282689.

The spelling of 61191270 in words is "sixty-one million, one hundred ninety-one thousand, two hundred seventy".