1625520 has 80 divisors (see below), whose sum is σ = 5437152. Its totient is φ = 399360.

The previous prime is 1625513. The next prime is 1625539. The reversal of 1625520 is 255261.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2860 + ... + 3380.

2^1625520 is an apocalyptic number.

1625520 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 1625520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2718576).

1625520 is an abundant number, since it is smaller than the sum of its proper divisors (3811632).

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

1625520 is a wasteful number, since it uses less digits than its factorization.

1625520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550 (or 544 counting only the distinct ones).

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

The square root of 1625520 is about 1274.9588228645. The cubic root of 1625520 is about 117.5792735003.

It can be divided in two parts, 1625 and 520, that added together give a triangular number (2145 = T₆₅).

The spelling of 1625520 in words is "one million, six hundred twenty-five thousand, five hundred twenty".