61173420 has 96 divisors (see below), whose sum is σ = 213566976. Its totient is φ = 12710400.

The previous prime is 61173403. The next prime is 61173421. The reversal of 61173420 is 2437116.

It is not an unprimeable number, because it can be changed into a prime (61173421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2001 + ... + 11240.

It is an arithmetic number, because the mean of its divisors is an integer number (2224656).

Almost surely, 2^61173420 is an apocalyptic number.

61173420 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61173420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106783488).

61173420 is an abundant number, since it is smaller than the sum of its proper divisors (152393556).

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

61173420 is a wasteful number, since it uses less digits than its factorization.

61173420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13271 (or 13269 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 61173420 is about 7821.3438742968. The cubic root of 61173420 is about 394.0224076170.

The spelling of 61173420 in words is "sixty-one million, one hundred seventy-three thousand, four hundred twenty".