61250391 has 16 divisors (see below), whose sum is σ = 91127520. Its totient is φ = 40659840.

The previous prime is 61250383. The next prime is 61250443. The reversal of 61250391 is 19305216.

It is not a de Polignac number, because 61250391 - 2³ = 61250383 is a prime.

It is a super-3 number, since 3×61250391³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61250381) 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, 1801 + ... + 11213.

It is an arithmetic number, because the mean of its divisors is an integer number (5695470).

Almost surely, 2^61250391 is an apocalyptic number.

61250391 is a deficient number, since it is larger than the sum of its proper divisors (29877129).

61250391 is a wasteful number, since it uses less digits than its factorization.

61250391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9663 (or 9657 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 61250391 is about 7826.2629012831. The cubic root of 61250391 is about 394.1875969400.

The spelling of 61250391 in words is "sixty-one million, two hundred fifty thousand, three hundred ninety-one".