2991725 has 36 divisors (see below), whose sum is σ = 4353888. Its totient is φ = 2032800.

The previous prime is 2991719. The next prime is 2991731. The reversal of 2991725 is 5271992.

It is an interprime number because it is at equal distance from previous prime (2991719) and next prime (2991731).

It is not a de Polignac number, because 2991725 - 2⁶ = 2991661 is a prime.

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 (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 69554 + ... + 69596.

2^2991725 is an apocalyptic number.

2991725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2991725 is a deficient number, since it is larger than the sum of its proper divisors (1362163).

2991725 is a wasteful number, since it uses less digits than its factorization.

2991725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98 (or 82 counting only the distinct ones).

The product of its digits is 11340, while the sum is 35.

The square root of 2991725 is about 1729.6603712868. The cubic root of 2991725 is about 144.0922280834.

The spelling of 2991725 in words is "two million, nine hundred ninety-one thousand, seven hundred twenty-five".