1621275 has 12 divisors (see below), whose sum is σ = 2680632. Its totient is φ = 864640.

The previous prime is 1621259. The next prime is 1621283. The reversal of 1621275 is 5721261.

It is not a de Polignac number, because 1621275 - 2⁴ = 1621259 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10734 + ... + 10883.

It is an arithmetic number, because the mean of its divisors is an integer number (223386).

2^1621275 is an apocalyptic number.

1621275 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1621275 is a deficient number, since it is larger than the sum of its proper divisors (1059357).

1621275 is a wasteful number, since it uses less digits than its factorization.

1621275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21630 (or 21625 counting only the distinct ones).

The product of its digits is 840, while the sum is 24.

The square root of 1621275 is about 1273.2929749276. The cubic root of 1621275 is about 117.4768326136.

The spelling of 1621275 in words is "one million, six hundred twenty-one thousand, two hundred seventy-five".