2125749 has 4 divisors (see below), whose sum is σ = 2834336. Its totient is φ = 1417164.

The previous prime is 2125741. The next prime is 2125751. The reversal of 2125749 is 9475212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2125749 - 2³ = 2125741 is a prime.

It is a super-2 number, since 2×2125749² = 9037617622002, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2125741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 354289 + ... + 354294.

It is an arithmetic number, because the mean of its divisors is an integer number (708584).

2^2125749 is an apocalyptic number.

It is an amenable number.

2125749 is a deficient number, since it is larger than the sum of its proper divisors (708587).

2125749 is an equidigital number, since it uses as much as digits as its factorization.

2125749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708586.

The product of its digits is 5040, while the sum is 30.

The square root of 2125749 is about 1457.9948559580. The cubic root of 2125749 is about 128.5791827775.

It can be divided in two parts, 2 and 125749, that added together give a triangular number (125751 = T₅₀₁).

The spelling of 2125749 in words is "two million, one hundred twenty-five thousand, seven hundred forty-nine".