2151123 has 16 divisors (see below), whose sum is σ = 3252480. Its totient is φ = 1253664.

The previous prime is 2151119. The next prime is 2151137. The reversal of 2151123 is 3211512.

It is not a de Polignac number, because 2151123 - 2² = 2151119 is a prime.

It is a super-2 number, since 2×2151123² = 9254660322258, which contains 22 as substring.

2151123 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2151623) 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, 711 + ... + 2192.

It is an arithmetic number, because the mean of its divisors is an integer number (203280).

2^2151123 is an apocalyptic number.

2151123 is a deficient number, since it is larger than the sum of its proper divisors (1101357).

2151123 is a wasteful number, since it uses less digits than its factorization.

2151123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2938.

The product of its digits is 60, while the sum is 15.

The square root of 2151123 is about 1466.6707196914. The cubic root of 2151123 is about 129.0887556974.

Adding to 2151123 its reverse (3211512), we get a palindrome (5362635).

The spelling of 2151123 in words is "two million, one hundred fifty-one thousand, one hundred twenty-three".