2154775 has 18 divisors (see below), whose sum is σ = 3109920. Its totient is φ = 1476720.

The previous prime is 2154749. The next prime is 2154791. The reversal of 2154775 is 5774512.

It is not a de Polignac number, because 2154775 - 2⁵ = 2154743 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 346 + ... + 2104.

2^2154775 is an apocalyptic number.

2154775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2154775 is a deficient number, since it is larger than the sum of its proper divisors (955145).

2154775 is a wasteful number, since it uses less digits than its factorization.

2154775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1783 (or 1771 counting only the distinct ones).

The product of its digits is 9800, while the sum is 31.

The square root of 2154775 is about 1467.9151882858. The cubic root of 2154775 is about 129.1617664923.

The spelling of 2154775 in words is "two million, one hundred fifty-four thousand, seven hundred seventy-five".