902138 has 4 divisors (see below), whose sum is σ = 1353210. Its totient is φ = 451068.

The previous prime is 902137. The next prime is 902141. The reversal of 902138 is 831209.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 831209 = 241 ⋅3449.

It can be written as a sum of positive squares in only one way, i.e., 896809 + 5329 = 947^2 + 73^2 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 902138.

It is not an unprimeable number, because it can be changed into a prime (902137) 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, 225533 + ... + 225536.

2⁹⁰²¹³⁸ is an apocalyptic number.

902138 is a deficient number, since it is larger than the sum of its proper divisors (451072).

902138 is a wasteful number, since it uses less digits than its factorization.

902138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451071.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 902138 is about 949.8094545750. The cubic root of 902138 is about 96.6253304570.

The spelling of 902138 in words is "nine hundred two thousand, one hundred thirty-eight".