1625091 has 8 divisors (see below), whose sum is σ = 2333520. Its totient is φ = 1000032.

The previous prime is 1625059. The next prime is 1625123. The reversal of 1625091 is 1905261.

It is an interprime number because it is at equal distance from previous prime (1625059) and next prime (1625123).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1625091 - 2⁵ = 1625059 is a prime.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (1625021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20796 + ... + 20873.

It is an arithmetic number, because the mean of its divisors is an integer number (291690).

2^1625091 is an apocalyptic number.

1625091 is a deficient number, since it is larger than the sum of its proper divisors (708429).

1625091 is a wasteful number, since it uses less digits than its factorization.

1625091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41685.

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 1625091 is about 1274.7905710351. The cubic root of 1625091 is about 117.5689289241.

It can be divided in two parts, 162 and 5091, that added together give a triangular number (5253 = T₁₀₂).

The spelling of 1625091 in words is "one million, six hundred twenty-five thousand, ninety-one".