61253745 has 32 divisors (see below), whose sum is σ = 113691648. Its totient is φ = 27580608.

The previous prime is 61253729. The next prime is 61253783. The reversal of 61253745 is 54735216.

61253745 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61253745 - 2⁴ = 61253729 is a prime.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 2682 + ... + 11388.

It is an arithmetic number, because the mean of its divisors is an integer number (3552864).

Almost surely, 2^61253745 is an apocalyptic number.

It is an amenable number.

61253745 is a deficient number, since it is larger than the sum of its proper divisors (52437903).

61253745 is a wasteful number, since it uses less digits than its factorization.

61253745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8789.

The product of its digits is 25200, while the sum is 33.

The square root of 61253745 is about 7826.4771768657. The cubic root of 61253745 is about 394.1947918931.

It can be divided in two parts, 6125 and 3745, that added together give a triangular number (9870 = T₁₄₀).

The spelling of 61253745 in words is "sixty-one million, two hundred fifty-three thousand, seven hundred forty-five".