61720254 has 48 divisors (see below), whose sum is σ = 137732400. Its totient is φ = 19966848.

The previous prime is 61720237. The next prime is 61720271. The reversal of 61720254 is 45202716.

61720254 is a `hidden beast` number, since 617 + 20 + 25 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (61720237) and next prime (61720271).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 94192 + ... + 94844.

It is an arithmetic number, because the mean of its divisors is an integer number (2869425).

Almost surely, 2^61720254 is an apocalyptic number.

61720254 is an abundant number, since it is smaller than the sum of its proper divisors (76012146).

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

61720254 is a wasteful number, since it uses less digits than its factorization.

61720254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809 (or 806 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 61720254 is about 7856.2239021046. The cubic root of 61720254 is about 395.1929922689.

The spelling of 61720254 in words is "sixty-one million, seven hundred twenty thousand, two hundred fifty-four".