61015121 has 2 divisors, whose sum is σ = 61015122. Its totient is φ = 61015120.

The previous prime is 61015063. The next prime is 61015127. The reversal of 61015121 is 12151016.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38925121 + 22090000 = 6239^2 + 4700^2 .

It is a cyclic number.

It is not a de Polignac number, because 61015121 - 2¹⁰ = 61014097 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61015121.

It is not a weakly prime, because it can be changed into another prime (61015127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30507560 + 30507561.

It is an arithmetic number, because the mean of its divisors is an integer number (30507561).

Almost surely, 2^61015121 is an apocalyptic number.

It is an amenable number.

61015121 is a deficient number, since it is larger than the sum of its proper divisors (1).

61015121 is an equidigital number, since it uses as much as digits as its factorization.

61015121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60, while the sum is 17.

The square root of 61015121 is about 7811.2176387552. The cubic root of 61015121 is about 393.6822422754.

Adding to 61015121 its reverse (12151016), we get a palindrome (73166137).

The spelling of 61015121 in words is "sixty-one million, fifteen thousand, one hundred twenty-one".