61243545 has 48 divisors (see below), whose sum is σ = 110468736. Its totient is φ = 28934400.

The previous prime is 61243519. The next prime is 61243579. The reversal of 61243545 is 54534216.

It is not a de Polignac number, because 61243545 - 2¹⁰ = 61242521 is a prime.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 74004 + ... + 74826.

It is an arithmetic number, because the mean of its divisors is an integer number (2301432).

Almost surely, 2^61243545 is an apocalyptic number.

It is an amenable number.

61243545 is a deficient number, since it is larger than the sum of its proper divisors (49225191).

61243545 is a wasteful number, since it uses less digits than its factorization.

61243545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 894 (or 883 counting only the distinct ones).

The product of its digits is 14400, while the sum is 30.

The square root of 61243545 is about 7825.8255155606. The cubic root of 61243545 is about 394.1729101829.

It can be divided in two parts, 6124 and 3545, that added together give a palindrome (9669).

The spelling of 61243545 in words is "sixty-one million, two hundred forty-three thousand, five hundred forty-five".