2156025 has 48 divisors (see below), whose sum is σ = 4017600. Its totient is φ = 1013760.

The previous prime is 2156023. The next prime is 2156039. The reversal of 2156025 is 5206512.

It is not a de Polignac number, because 2156025 - 2¹ = 2156023 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2155992 and 2156010.

It is not an unprimeable number, because it can be changed into a prime (2156023) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 24181 + ... + 24269.

It is an arithmetic number, because the mean of its divisors is an integer number (83700).

2^2156025 is an apocalyptic number.

2156025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2156025 is a deficient number, since it is larger than the sum of its proper divisors (1861575).

2156025 is a wasteful number, since it uses less digits than its factorization.

2156025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138 (or 133 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 2156025 is about 1468.3409004724. The cubic root of 2156025 is about 129.1867375447.

The spelling of 2156025 in words is "two million, one hundred fifty-six thousand, twenty-five".