1625240 has 32 divisors (see below), whose sum is σ = 3749760. Its totient is φ = 633600.

The previous prime is 1625227. The next prime is 1625257. The reversal of 1625240 is 425261.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1145 + ... + 2135.

It is an arithmetic number, because the mean of its divisors is an integer number (117180).

2^1625240 is an apocalyptic number.

1625240 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 1625240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1874880).

1625240 is an abundant number, since it is smaller than the sum of its proper divisors (2124520).

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

1625240 is a wasteful number, since it uses less digits than its factorization.

1625240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1043 (or 1039 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1625240 is about 1274.8490106675. The cubic root of 1625240 is about 117.5725220019.

The spelling of 1625240 in words is "one million, six hundred twenty-five thousand, two hundred forty".