61610121 has 12 divisors (see below), whose sum is σ = 89069760. Its totient is φ = 41037720.

The previous prime is 61610111. The next prime is 61610147. The reversal of 61610121 is 12101616.

It is not a de Polignac number, because 61610121 - 2⁵ = 61610089 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 61610094 and 61610103.

It is not an unprimeable number, because it can be changed into a prime (61610111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11836 + ... + 16226.

It is an arithmetic number, because the mean of its divisors is an integer number (7422480).

Almost surely, 2^61610121 is an apocalyptic number.

It is an amenable number.

61610121 is a deficient number, since it is larger than the sum of its proper divisors (27459639).

61610121 is a wasteful number, since it uses less digits than its factorization.

61610121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5956 (or 5953 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 61610121 is about 7849.2114890605. The cubic root of 61610121 is about 394.9577928517.

Adding to 61610121 its reverse (12101616), we get a palindrome (73711737).

The spelling of 61610121 in words is "sixty-one million, six hundred ten thousand, one hundred twenty-one".