1872491 has 2 divisors, whose sum is σ = 1872492. Its totient is φ = 1872490.

The previous prime is 1872473. The next prime is 1872503. The reversal of 1872491 is 1942781.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1872491 - 2⁶ = 1872427 is a prime.

It is not a weakly prime, because it can be changed into another prime (1872421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 936245 + 936246.

It is an arithmetic number, because the mean of its divisors is an integer number (936246).

2^1872491 is an apocalyptic number.

1872491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1872491 is an equidigital number, since it uses as much as digits as its factorization.

1872491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 32.

The square root of 1872491 is about 1368.3899298080. The cubic root of 1872491 is about 123.2555771552.

The spelling of 1872491 in words is "one million, eight hundred seventy-two thousand, four hundred ninety-one".