1860641 has 2 divisors, whose sum is σ = 1860642. Its totient is φ = 1860640.

The previous prime is 1860637. The next prime is 1860643. The reversal of 1860641 is 1460681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1745041 + 115600 = 1321^2 + 340^2 .

It is an emirp because it is prime and its reverse (1460681) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1860641 - 2² = 1860637 is a prime.

It is a super-3 number, since 3×1860641³ = 19324533311338064163, which contains 333 as substring.

Together with 1860643, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1860641.

It is not a weakly prime, because it can be changed into another prime (1860643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 930320 + 930321.

It is an arithmetic number, because the mean of its divisors is an integer number (930321).

2^1860641 is an apocalyptic number.

It is an amenable number.

1860641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1860641 is an equidigital number, since it uses as much as digits as its factorization.

1860641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 1860641 is about 1364.0531514571. The cubic root of 1860641 is about 122.9950203990.

The spelling of 1860641 in words is "one million, eight hundred sixty thousand, six hundred forty-one".