1625422 has 4 divisors (see below), whose sum is σ = 2438136. Its totient is φ = 812710.

The previous prime is 1625419. The next prime is 1625453. The reversal of 1625422 is 2245261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2245261 = 73 ⋅30757.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 1625393 and 1625402.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406354 + ... + 406357.

It is an arithmetic number, because the mean of its divisors is an integer number (609534).

2^1625422 is an apocalyptic number.

1625422 is a deficient number, since it is larger than the sum of its proper divisors (812714).

1625422 is an equidigital number, since it uses as much as digits as its factorization.

1625422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812713.

The product of its digits is 960, while the sum is 22.

The square root of 1625422 is about 1274.9203896714. The cubic root of 1625422 is about 117.5769105641.

The spelling of 1625422 in words is "one million, six hundred twenty-five thousand, four hundred twenty-two".