2123572 has 36 divisors (see below), whose sum is σ = 4332384. Its totient is φ = 903040.

The previous prime is 2123557. The next prime is 2123581. The reversal of 2123572 is 2753212.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12633 + ... + 12799.

It is an arithmetic number, because the mean of its divisors is an integer number (120344).

2^2123572 is an apocalyptic number.

2123572 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2123572 is an abundant number, since it is smaller than the sum of its proper divisors (2208812).

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

2123572 is a wasteful number, since it uses less digits than its factorization.

2123572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216 (or 197 counting only the distinct ones).

The product of its digits is 840, while the sum is 22.

The square root of 2123572 is about 1457.2480914381. The cubic root of 2123572 is about 128.5352747259.

Adding to 2123572 its reverse (2753212), we get a palindrome (4876784).

The spelling of 2123572 in words is "two million, one hundred twenty-three thousand, five hundred seventy-two".