2602139 has 4 divisors (see below), whose sum is σ = 2755224. Its totient is φ = 2449056.

The previous prime is 2602121. The next prime is 2602163. The reversal of 2602139 is 9312062.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2602139 - 2¹⁶ = 2536603 is a prime.

It is a super-2 number, since 2×2602139² = 13542254750642, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2602169) 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 in 3 ways as a sum of consecutive naturals, for example, 76517 + ... + 76550.

It is an arithmetic number, because the mean of its divisors is an integer number (688806).

2^2602139 is an apocalyptic number.

2602139 is a deficient number, since it is larger than the sum of its proper divisors (153085).

2602139 is a wasteful number, since it uses less digits than its factorization.

2602139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153084.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 2602139 is about 1613.1146890410. The cubic root of 2602139 is about 137.5445849906.

The spelling of 2602139 in words is "two million, six hundred two thousand, one hundred thirty-nine".