1915725 has 48 divisors (see below), whose sum is σ = 3749760. Its totient is φ = 844800.

The previous prime is 1915721. The next prime is 1915729. The reversal of 1915725 is 5275191.

It is an interprime number because it is at equal distance from previous prime (1915721) and next prime (1915729).

It is not a de Polignac number, because 1915725 - 2² = 1915721 is a prime.

Its product of digits (3150) is a multiple of the sum of its prime factors (150).

1915725 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1915692 and 1915701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1915721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21481 + ... + 21569.

It is an arithmetic number, because the mean of its divisors is an integer number (78120).

2^1915725 is an apocalyptic number.

1915725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1915725 is a deficient number, since it is larger than the sum of its proper divisors (1834035).

1915725 is a wasteful number, since it uses less digits than its factorization.

1915725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150 (or 145 counting only the distinct ones).

The product of its digits is 3150, while the sum is 30.

The square root of 1915725 is about 1384.0971786692. The cubic root of 1915725 is about 124.1969857245.

The spelling of 1915725 in words is "one million, nine hundred fifteen thousand, seven hundred twenty-five".