1625265 has 20 divisors (see below), whose sum is σ = 2914164. Its totient is φ = 866592.

The previous prime is 1625263. The next prime is 1625287. The reversal of 1625265 is 5625261.

It can be written as a sum of positive squares in 2 ways, for example, as 998001 + 627264 = 999^2 + 792^2 .

It is not a de Polignac number, because 1625265 - 2¹ = 1625263 is a prime.

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

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1625263) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1602 + ... + 2411.

2^1625265 is an apocalyptic number.

1625265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1625265 is a deficient number, since it is larger than the sum of its proper divisors (1288899).

1625265 is an equidigital number, since it uses as much as digits as its factorization.

1625265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4030 (or 4021 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 1625265 is about 1274.8588157125. The cubic root of 1625265 is about 117.5731248458.

It can be divided in two parts, 16 and 25265, that added together give a square (25281 = 159²).

The spelling of 1625265 in words is "one million, six hundred twenty-five thousand, two hundred sixty-five".