2581425 has 72 divisors (see below), whose sum is σ = 5803200. Its totient is φ = 1065600.

The previous prime is 2581417. The next prime is 2581429. The reversal of 2581425 is 5241852.

It is a happy number.

It is not a de Polignac number, because 2581425 - 2³ = 2581417 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2581429) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 17251 + ... + 17399.

It is an arithmetic number, because the mean of its divisors is an integer number (80600).

2^2581425 is an apocalyptic number.

2581425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2581425 is an abundant number, since it is smaller than the sum of its proper divisors (3221775).

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

2581425 is a wasteful number, since it uses less digits than its factorization.

2581425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183 (or 175 counting only the distinct ones).

The product of its digits is 3200, while the sum is 27.

The square root of 2581425 is about 1606.6813623118. The cubic root of 2581425 is about 137.1786434698.

The spelling of 2581425 in words is "two million, five hundred eighty-one thousand, four hundred twenty-five".