1881437 has 4 divisors (see below), whose sum is σ = 1980480. Its totient is φ = 1782396.

The previous prime is 1881431. The next prime is 1881461. The reversal of 1881437 is 7341881.

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 a cyclic number.

It is not a de Polignac number, because 1881437 - 2⁸ = 1881181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1881431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49493 + ... + 49530.

It is an arithmetic number, because the mean of its divisors is an integer number (495120).

2^1881437 is an apocalyptic number.

It is an amenable number.

1881437 is a deficient number, since it is larger than the sum of its proper divisors (99043).

1881437 is an equidigital number, since it uses as much as digits as its factorization.

1881437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99042.

The product of its digits is 5376, while the sum is 32.

The square root of 1881437 is about 1371.6548399652. The cubic root of 1881437 is about 123.4515537169.

The spelling of 1881437 in words is "one million, eight hundred eighty-one thousand, four hundred thirty-seven".