61051725 has 120 divisors (see below), whose sum is σ = 133235520. Its totient is φ = 27060480.

The previous prime is 61051717. The next prime is 61051751. The reversal of 61051725 is 52715016.

It is not a de Polignac number, because 61051725 - 2³ = 61051717 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 836289 + ... + 836361.

It is an arithmetic number, because the mean of its divisors is an integer number (1110296).

Almost surely, 2^61051725 is an apocalyptic number.

It is an amenable number.

61051725 is an abundant number, since it is smaller than the sum of its proper divisors (72183795).

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

61051725 is a wasteful number, since it uses less digits than its factorization.

61051725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161 (or 147 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

The square root of 61051725 is about 7813.5603280451. The cubic root of 61051725 is about 393.7609520763.

It can be divided in two parts, 61051 and 725, that added together give a triangular number (61776 = T₃₅₁).

The spelling of 61051725 in words is "sixty-one million, fifty-one thousand, seven hundred twenty-five".