1625455 has 16 divisors (see below), whose sum is σ = 2225664. Its totient is φ = 1128960.

The previous prime is 1625453. The next prime is 1625461. The reversal of 1625455 is 5545261.

It is not a de Polignac number, because 1625455 - 2¹ = 1625453 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1625453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 370 + ... + 1840.

It is an arithmetic number, because the mean of its divisors is an integer number (139104).

2^1625455 is an apocalyptic number.

1625455 is a deficient number, since it is larger than the sum of its proper divisors (600209).

1625455 is a wasteful number, since it uses less digits than its factorization.

1625455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1506.

The product of its digits is 6000, while the sum is 28.

The square root of 1625455 is about 1274.9333315903. The cubic root of 1625455 is about 117.5777062573.

It can be divided in two parts, 1625 and 455, that added together give a triangular number (2080 = T₆₄).

The spelling of 1625455 in words is "one million, six hundred twenty-five thousand, four hundred fifty-five".