2123434 has 4 divisors (see below), whose sum is σ = 3185154. Its totient is φ = 1061716.

The previous prime is 2123423. The next prime is 2123461. The reversal of 2123434 is 4343212.

2123434 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1918225 + 205209 = 1385^2 + 453^2 .

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 530857 + ... + 530860.

2^2123434 is an apocalyptic number.

2123434 is a deficient number, since it is larger than the sum of its proper divisors (1061720).

2123434 is a wasteful number, since it uses less digits than its factorization.

2123434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1061719.

The product of its digits is 576, while the sum is 19.

The square root of 2123434 is about 1457.2007411472. The cubic root of 2123434 is about 128.5324903839.

Adding to 2123434 its reverse (4343212), we get a palindrome (6466646).

The spelling of 2123434 in words is "two million, one hundred twenty-three thousand, four hundred thirty-four".