2145825 has 72 divisors (see below), whose sum is σ = 4568160. Its totient is φ = 979200.

The previous prime is 2145823. The next prime is 2145827. The reversal of 2145825 is 5285412.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2145823) and next prime (2145827).

It is not a de Polignac number, because 2145825 - 2¹ = 2145823 is a prime.

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

Its product of digits (3200) is a multiple of the sum of its prime factors (64).

It is not an unprimeable number, because it can be changed into a prime (2145821) 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, 126217 + ... + 126233.

2^2145825 is an apocalyptic number.

2145825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2145825 is an abundant number, since it is smaller than the sum of its proper divisors (2422335).

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

2145825 is a wasteful number, since it uses less digits than its factorization.

2145825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64 (or 36 counting only the distinct ones).

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

The square root of 2145825 is about 1464.8634748672. The cubic root of 2145825 is about 128.9826910254.

The spelling of 2145825 in words is "two million, one hundred forty-five thousand, eight hundred twenty-five".