1902139 has 8 divisors (see below), whose sum is σ = 1989360. Its totient is φ = 1816416.

The previous prime is 1902127. The next prime is 1902143. The reversal of 1902139 is 9312091.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1902139 - 2⁵ = 1902107 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1902119) 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 in 7 ways as a sum of consecutive naturals, for example, 2797 + ... + 3409.

It is an arithmetic number, because the mean of its divisors is an integer number (248670).

2^1902139 is an apocalyptic number.

1902139 is a deficient number, since it is larger than the sum of its proper divisors (87221).

1902139 is a wasteful number, since it uses less digits than its factorization.

1902139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 749.

The product of its (nonzero) digits is 486, while the sum is 25.

The square root of 1902139 is about 1379.1805538072. The cubic root of 1902139 is about 123.9026942133.

The spelling of 1902139 in words is "one million, nine hundred two thousand, one hundred thirty-nine".