2155426 has 24 divisors (see below), whose sum is σ = 4005504. Its totient is φ = 851760.

The previous prime is 2155423. The next prime is 2155429. The reversal of 2155426 is 6245512.

It is an interprime number because it is at equal distance from previous prime (2155423) and next prime (2155429).

It is a super-2 number, since 2×2155426² = 9291722482952, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2155426.

It is not an unprimeable number, because it can be changed into a prime (2155423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1911 + ... + 2821.

It is an arithmetic number, because the mean of its divisors is an integer number (166896).

2^2155426 is an apocalyptic number.

2155426 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2155426 is a deficient number, since it is larger than the sum of its proper divisors (1850078).

2155426 is a wasteful number, since it uses less digits than its factorization.

2155426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 946 (or 933 counting only the distinct ones).

The product of its digits is 2400, while the sum is 25.

The square root of 2155426 is about 1468.1369145962. The cubic root of 2155426 is about 129.1747726211.

The spelling of 2155426 in words is "two million, one hundred fifty-five thousand, four hundred twenty-six".