1625040 has 120 divisors (see below), whose sum is σ = 5696808. Its totient is φ = 414720.

The previous prime is 1625027. The next prime is 1625059. The reversal of 1625040 is 405261.

It is a happy number.

1625040 is a `hidden beast` number, since 1 + 625 + 0 + 40 = 666.

1625040 is nontrivially palindromic in base 11.

It can be written as a sum of positive squares in 4 ways, for example, as 97344 + 1527696 = 312^2 + 1236^2 .

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26610 + ... + 26670.

2^1625040 is an apocalyptic number.

1625040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1625040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2848404).

1625040 is an abundant number, since it is smaller than the sum of its proper divisors (4071768).

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

1625040 is a wasteful number, since it uses less digits than its factorization.

1625040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117 (or 108 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 1625040 is about 1274.7705675925. The cubic root of 1625040 is about 117.5676990283.

It can be divided in two parts, 16250 and 40, that added together give a triangular number (16290 = T₁₈₀).

The spelling of 1625040 in words is "one million, six hundred twenty-five thousand, forty".