902139 has 36 divisors (see below), whose sum is σ = 1563624. Its totient is φ = 459648.

The previous prime is 902137. The next prime is 902141. The reversal of 902139 is 931209.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (902137) and next prime (902141).

It is not a de Polignac number, because 902139 - 2¹ = 902137 is a prime.

902139 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 902139.

It is not an unprimeable number, because it can be changed into a prime (902137) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 47472 + ... + 47490.

It is an arithmetic number, because the mean of its divisors is an integer number (43434).

2⁹⁰²¹³⁹ is an apocalyptic number.

902139 is a deficient number, since it is larger than the sum of its proper divisors (661485).

902139 is a wasteful number, since it uses less digits than its factorization.

902139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72 (or 46 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 24.

The square root of 902139 is about 949.8099809962. The cubic root of 902139 is about 96.6253661594.

It can be divided in two parts, 90 and 2139, that multiplied together give a triangular number (192510 = T₆₂₀).

The spelling of 902139 in words is "nine hundred two thousand, one hundred thirty-nine".