61420975 has 24 divisors (see below), whose sum is σ = 94958208. Its totient is φ = 38287200.

The previous prime is 61420973. The next prime is 61420981. The reversal of 61420975 is 57902416.

It is not a de Polignac number, because 61420975 - 2¹ = 61420973 is a prime.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61420975.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61420973) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14029 + ... + 17878.

It is an arithmetic number, because the mean of its divisors is an integer number (3956592).

Almost surely, 2^61420975 is an apocalyptic number.

61420975 is a deficient number, since it is larger than the sum of its proper divisors (33537233).

61420975 is a wasteful number, since it uses less digits than its factorization.

61420975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31935 (or 31930 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 61420975 is about 7837.1535011125. The cubic root of 61420975 is about 394.5531987952.

The spelling of 61420975 in words is "sixty-one million, four hundred twenty thousand, nine hundred seventy-five".