61525859 has 4 divisors (see below), whose sum is σ = 61598016. Its totient is φ = 61453704.

The previous prime is 61525847. The next prime is 61525861. The reversal of 61525859 is 95852516.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61525859 - 2⁴ = 61525843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61525879) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34784 + ... + 36509.

It is an arithmetic number, because the mean of its divisors is an integer number (15399504).

Almost surely, 2^61525859 is an apocalyptic number.

61525859 is a deficient number, since it is larger than the sum of its proper divisors (72157).

61525859 is an equidigital number, since it uses as much as digits as its factorization.

61525859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72156.

The product of its digits is 108000, while the sum is 41.

The square root of 61525859 is about 7843.8421070289. The cubic root of 61525859 is about 394.7776540668. Note that the first 3 decimals are identical.

The spelling of 61525859 in words is "sixty-one million, five hundred twenty-five thousand, eight hundred fifty-nine".