61512601 has 2 divisors, whose sum is σ = 61512602. Its totient is φ = 61512600.

The previous prime is 61512571. The next prime is 61512623. The reversal of 61512601 is 10621516.

It is an a-pointer prime, because the next prime (61512623) can be obtained adding 61512601 to its sum of digits (22).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36000000 + 25512601 = 6000^2 + 5051^2 .

It is a cyclic number.

It is not a de Polignac number, because 61512601 - 2⁵ = 61512569 is a prime.

It is not a weakly prime, because it can be changed into another prime (61572601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30756300 + 30756301.

It is an arithmetic number, because the mean of its divisors is an integer number (30756301).

Almost surely, 2^61512601 is an apocalyptic number.

It is an amenable number.

61512601 is a deficient number, since it is larger than the sum of its proper divisors (1).

61512601 is an equidigital number, since it uses as much as digits as its factorization.

61512601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 61512601 is about 7842.9969399459. The cubic root of 61512601 is about 394.7492955943.

The spelling of 61512601 in words is "sixty-one million, five hundred twelve thousand, six hundred one".