1902881 has 2 divisors, whose sum is σ = 1902882. Its totient is φ = 1902880.

The previous prime is 1902877. The next prime is 1902883. The reversal of 1902881 is 1882091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1288225 + 614656 = 1135^2 + 784^2 .

It is a cyclic number.

It is not a de Polignac number, because 1902881 - 2² = 1902877 is a prime.

It is a super-2 number, since 2×1902881² = 7241912200322, which contains 22 as substring.

Together with 1902883, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1902883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 951440 + 951441.

It is an arithmetic number, because the mean of its divisors is an integer number (951441).

2^1902881 is an apocalyptic number.

It is an amenable number.

1902881 is a deficient number, since it is larger than the sum of its proper divisors (1).

1902881 is an equidigital number, since it uses as much as digits as its factorization.

1902881 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 29.

The square root of 1902881 is about 1379.4495278915. The cubic root of 1902881 is about 123.9188030689.

The spelling of 1902881 in words is "one million, nine hundred two thousand, eight hundred eighty-one".