61245780 has 48 divisors (see below), whose sum is σ = 178948224. Its totient is φ = 15621760.

The previous prime is 61245773. The next prime is 61245787. The reversal of 61245780 is 8754216.

It is an interprime number because it is at equal distance from previous prime (61245773) and next prime (61245787).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61245787) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20811 + ... + 23570.

It is an arithmetic number, because the mean of its divisors is an integer number (3728088).

Almost surely, 2^61245780 is an apocalyptic number.

61245780 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61245780 is an abundant number, since it is smaller than the sum of its proper divisors (117702444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61245780 is a wasteful number, since it uses less digits than its factorization.

61245780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44416 (or 44414 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 61245780 is about 7825.9683106948. The cubic root of 61245780 is about 394.1777050596.

Adding to 61245780 its reverse (8754216), we get a palindrome (69999996).

The spelling of 61245780 in words is "sixty-one million, two hundred forty-five thousand, seven hundred eighty".