2123451 has 24 divisors (see below), whose sum is σ = 3397680. Its totient is φ = 1267200.

The previous prime is 2123423. The next prime is 2123461. The reversal of 2123451 is 1543212.

2123451 is a `hidden beast` number, since 212 + 3 + 451 = 666.

2123451 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2123451 - 2¹⁰ = 2122427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2123411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8691 + ... + 8931.

It is an arithmetic number, because the mean of its divisors is an integer number (141570).

2^2123451 is an apocalyptic number.

2123451 is a deficient number, since it is larger than the sum of its proper divisors (1274229).

2123451 is a wasteful number, since it uses less digits than its factorization.

2123451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347 (or 344 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 2123451 is about 1457.2065742372. The cubic root of 2123451 is about 128.5328333890.

Adding to 2123451 its reverse (1543212), we get a palindrome (3666663).

It can be divided in two parts, 212 and 3451, that added together give a palindrome (3663).

The spelling of 2123451 in words is "two million, one hundred twenty-three thousand, four hundred fifty-one".