2123457 has 8 divisors (see below), whose sum is σ = 3235776. Its totient is φ = 1213392.

The previous prime is 2123423. The next prime is 2123461. The reversal of 2123457 is 7543212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2123457 - 2¹⁴ = 2107073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2123257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50538 + ... + 50579.

It is an arithmetic number, because the mean of its divisors is an integer number (404472).

2^2123457 is an apocalyptic number.

It is an amenable number.

2123457 is a deficient number, since it is larger than the sum of its proper divisors (1112319).

2123457 is a wasteful number, since it uses less digits than its factorization.

2123457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101127.

The product of its digits is 1680, while the sum is 24.

The square root of 2123457 is about 1457.2086329692. The cubic root of 2123457 is about 128.5329544492.

Adding to 2123457 its reverse (7543212), we get a palindrome (9666669).

The spelling of 2123457 in words is "two million, one hundred twenty-three thousand, four hundred fifty-seven".