1920487 has 2 divisors, whose sum is σ = 1920488. Its totient is φ = 1920486.

The previous prime is 1920469. The next prime is 1920497. The reversal of 1920487 is 7840291.

It is a strong prime.

It is an emirp because it is prime and its reverse (7840291) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1920487 - 2¹¹ = 1918439 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1920407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 960243 + 960244.

It is an arithmetic number, because the mean of its divisors is an integer number (960244).

2^1920487 is an apocalyptic number.

1920487 is a deficient number, since it is larger than the sum of its proper divisors (1).

1920487 is an equidigital number, since it uses as much as digits as its factorization.

1920487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 1920487 is about 1385.8163659013. The cubic root of 1920487 is about 124.2998078375.

It can be divided in two parts, 19204 and 87, that added together give a palindrome (19291).

The spelling of 1920487 in words is "one million, nine hundred twenty thousand, four hundred eighty-seven".