2123415 has 60 divisors (see below), whose sum is σ = 4469256. Its totient is φ = 961632.

The previous prime is 2123411. The next prime is 2123423. The reversal of 2123415 is 5143212.

It is not a de Polignac number, because 2123415 - 2² = 2123411 is a prime.

It is a congruent number.

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

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 19792 + ... + 19898.

2^2123415 is an apocalyptic number.

2123415 is an abundant number, since it is smaller than the sum of its proper divisors (2345841).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2123415 is a wasteful number, since it uses less digits than its factorization.

2123415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138 (or 122 counting only the distinct ones).

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

The square root of 2123415 is about 1457.1942217838. The cubic root of 2123415 is about 128.5321070230.

Adding to 2123415 its reverse (5143212), we get a palindrome (7266627).

It can be divided in two parts, 21 and 23415, that added together give a triangular number (23436 = T₂₁₆).

The spelling of 2123415 in words is "two million, one hundred twenty-three thousand, four hundred fifteen".