61252590 has 96 divisors (see below), whose sum is σ = 175233024. Its totient is φ = 13409280.

The previous prime is 61252579. The next prime is 61252643. The reversal of 61252590 is 9525216.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 631422 + ... + 631518.

It is an arithmetic number, because the mean of its divisors is an integer number (1825344).

Almost surely, 2^61252590 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61252590, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87616512).

61252590 is an abundant number, since it is smaller than the sum of its proper divisors (113980434).

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

61252590 is a wasteful number, since it uses less digits than its factorization.

61252590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242 (or 145 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 61252590 is about 7826.4033885304. The cubic root of 61252590 is about 394.1923142332.

The spelling of 61252590 in words is "sixty-one million, two hundred fifty-two thousand, five hundred ninety".