1862521 has 2 divisors, whose sum is σ = 1862522. Its totient is φ = 1862520.

The previous prime is 1862519. The next prime is 1862561. The reversal of 1862521 is 1252681.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1860496 + 2025 = 1364^2 + 45^2 .

It is an emirp because it is prime and its reverse (1252681) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1862521 - 2¹ = 1862519 is a prime.

Together with 1862519, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1862501) 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 as a sum of consecutive naturals, namely, 931260 + 931261.

It is an arithmetic number, because the mean of its divisors is an integer number (931261).

2^1862521 is an apocalyptic number.

It is an amenable number.

1862521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1862521 is an equidigital number, since it uses as much as digits as its factorization.

1862521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 960, while the sum is 25.

The square root of 1862521 is about 1364.7421001786. The cubic root of 1862521 is about 123.0364313614.

The spelling of 1862521 in words is "one million, eight hundred sixty-two thousand, five hundred twenty-one".