61245591 has 8 divisors (see below), whose sum is σ = 89084544. Its totient is φ = 37118520.

The previous prime is 61245557. The next prime is 61245601. The reversal of 61245591 is 19554216.

61245591 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61245591 - 2⁷ = 61245463 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 1855927 = 61245591 / (6 + 1 + 2 + 4 + 5 + 5 + 9 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61245521) 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 7 ways as a sum of consecutive naturals, for example, 927931 + ... + 927996.

It is an arithmetic number, because the mean of its divisors is an integer number (11135568).

Almost surely, 2^61245591 is an apocalyptic number.

61245591 is a deficient number, since it is larger than the sum of its proper divisors (27838953).

61245591 is a wasteful number, since it uses less digits than its factorization.

61245591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1855941.

The product of its digits is 10800, while the sum is 33.

The square root of 61245591 is about 7825.9562355025. The cubic root of 61245591 is about 394.1772995913.

The spelling of 61245591 in words is "sixty-one million, two hundred forty-five thousand, five hundred ninety-one".