61245755 has 4 divisors (see below), whose sum is σ = 73494912. Its totient is φ = 48996600.

The previous prime is 61245727. The next prime is 61245761. The reversal of 61245755 is 55754216.

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

It is a de Polignac number, because none of the positive numbers 2^k-61245755 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6124571 + ... + 6124580.

It is an arithmetic number, because the mean of its divisors is an integer number (18373728).

Almost surely, 2^61245755 is an apocalyptic number.

61245755 is a deficient number, since it is larger than the sum of its proper divisors (12249157).

61245755 is a wasteful number, since it uses less digits than its factorization.

61245755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12249156.

The product of its digits is 42000, while the sum is 35.

The square root of 61245755 is about 7825.9667134482. The cubic root of 61245755 is about 394.1776514263.

The spelling of 61245755 in words is "sixty-one million, two hundred forty-five thousand, seven hundred fifty-five".