1872749 has 4 divisors (see below), whose sum is σ = 1889436. Its totient is φ = 1856064.

The previous prime is 1872743. The next prime is 1872751. The reversal of 1872749 is 9472781.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9472781 = 1741 ⋅5441.

It can be written as a sum of positive squares in 2 ways, for example, as 515524 + 1357225 = 718^2 + 1165^2 .

It is a cyclic number.

It is not a de Polignac number, because 1872749 - 2¹⁶ = 1807213 is a prime.

It is an Ulam number.

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

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1872743) 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, 8174 + ... + 8399.

It is an arithmetic number, because the mean of its divisors is an integer number (472359).

2^1872749 is an apocalyptic number.

It is an amenable number.

1872749 is a deficient number, since it is larger than the sum of its proper divisors (16687).

1872749 is a wasteful number, since it uses less digits than its factorization.

1872749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16686.

The product of its digits is 28224, while the sum is 38.

The square root of 1872749 is about 1368.4841979358. The cubic root of 1872749 is about 123.2612377927.

The spelling of 1872749 in words is "one million, eight hundred seventy-two thousand, seven hundred forty-nine".