2055921 has 16 divisors (see below), whose sum is σ = 3201024. Its totient is φ = 1149264.

The previous prime is 2055917. The next prime is 2055953. The reversal of 2055921 is 1295502.

It is not a de Polignac number, because 2055921 - 2² = 2055917 is a prime.

It is a super-2 number, since 2×2055921² = 8453622316482, which contains 22 as substring.

2055921 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2055891 and 2055900.

It is not an unprimeable number, because it can be changed into a prime (2055961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55 + ... + 2028.

It is an arithmetic number, because the mean of its divisors is an integer number (200064).

2^2055921 is an apocalyptic number.

2055921 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2055921 is a deficient number, since it is larger than the sum of its proper divisors (1145103).

2055921 is a wasteful number, since it uses less digits than its factorization.

2055921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2140.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 2055921 is about 1433.8483183378. The cubic root of 2055921 is about 127.1555949388.

The spelling of 2055921 in words is "two million, fifty-five thousand, nine hundred twenty-one".