61502121 has 12 divisors (see below), whose sum is σ = 89120772. Its totient is φ = 40870176.

The previous prime is 61502093. The next prime is 61502137. The reversal of 61502121 is 12120516.

It can be written as a sum of positive squares in 2 ways, for example, as 4665600 + 56836521 = 2160^2 + 7539^2 .

It is a de Polignac number, because none of the positive numbers 2^k-61502121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61502094 and 61502103.

It is not an unprimeable number, because it can be changed into a prime (61502921) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7926 + ... + 13631.

It is an arithmetic number, because the mean of its divisors is an integer number (7426731).

Almost surely, 2^61502121 is an apocalyptic number.

It is an amenable number.

61502121 is a deficient number, since it is larger than the sum of its proper divisors (27618651).

61502121 is a wasteful number, since it uses less digits than its factorization.

61502121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21880 (or 21877 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 61502121 is about 7842.3287995340. The cubic root of 61502121 is about 394.7268762986.

Adding to 61502121 its reverse (12120516), we get a palindrome (73622637).

The spelling of 61502121 in words is "sixty-one million, five hundred two thousand, one hundred twenty-one".