1625849 has 4 divisors (see below), whose sum is σ = 1711440. Its totient is φ = 1540260.

The previous prime is 1625843. The next prime is 1625851. The reversal of 1625849 is 9485261.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1625849 - 2¹⁶ = 1560313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1625843) by changing a digit.

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

It is an upside-down number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42767 + ... + 42804.

It is an arithmetic number, because the mean of its divisors is an integer number (427860).

2^1625849 is an apocalyptic number.

1625849 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1625849 is a deficient number, since it is larger than the sum of its proper divisors (85591).

1625849 is an equidigital number, since it uses as much as digits as its factorization.

1625849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85590.

The product of its digits is 17280, while the sum is 35.

The square root of 1625849 is about 1275.0878401114. The cubic root of 1625849 is about 117.5872055203.

The spelling of 1625849 in words is "one million, six hundred twenty-five thousand, eight hundred forty-nine".