61572489 has 16 divisors (see below), whose sum is σ = 90249984. Its totient is φ = 37029200.

The previous prime is 61572443. The next prime is 61572503. The reversal of 61572489 is 98427516.

61572489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 61572489 - 2⁸ = 61572233 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61572489.

It is not an unprimeable number, because it can be changed into a prime (61572409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2799 + ... + 11444.

It is an arithmetic number, because the mean of its divisors is an integer number (5640624).

Almost surely, 2^61572489 is an apocalyptic number.

It is an amenable number.

61572489 is a deficient number, since it is larger than the sum of its proper divisors (28677495).

61572489 is a wasteful number, since it uses less digits than its factorization.

61572489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14388.

The product of its digits is 120960, while the sum is 42.

The square root of 61572489 is about 7846.8139394279. The cubic root of 61572489 is about 394.8773619171.

It can be divided in two parts, 6157 and 2489, that added together give a triangular number (8646 = T₁₃₁).

The spelling of 61572489 in words is "sixty-one million, five hundred seventy-two thousand, four hundred eighty-nine".