2124621 has 6 divisors (see below), whose sum is σ = 3068910. Its totient is φ = 1416408.

The previous prime is 2124601. The next prime is 2124631. The reversal of 2124621 is 1264212.

2124621 is a `hidden beast` number, since 21 + 24 + 621 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1102500 + 1022121 = 1050^2 + 1011^2 .

It is not a de Polignac number, because 2124621 - 2⁵ = 2124589 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 2124594 and 2124603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2124601) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 118026 + ... + 118043.

It is an arithmetic number, because the mean of its divisors is an integer number (511485).

2^2124621 is an apocalyptic number.

It is an amenable number.

2124621 is a deficient number, since it is larger than the sum of its proper divisors (944289).

2124621 is a wasteful number, since it uses less digits than its factorization.

2124621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236075 (or 236072 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 2124621 is about 1457.6079719870. The cubic root of 2124621 is about 128.5564358179.

Adding to 2124621 its reverse (1264212), we get a palindrome (3388833).

It can be divided in two parts, 21 and 24621, that added together give a palindrome (24642).

The spelling of 2124621 in words is "two million, one hundred twenty-four thousand, six hundred twenty-one".