2139475 has 24 divisors (see below), whose sum is σ = 2968560. Its totient is φ = 1518720.

The previous prime is 2139463. The next prime is 2139481. The reversal of 2139475 is 5749312.

It is not a de Polignac number, because 2139475 - 2¹⁷ = 2008403 is a prime.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a d-powerful number, because it can be written as 2²¹ + 1 + 3⁹ + 9³ + 4⁷ + 7⁴ + 5⁵ .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9312 + ... + 9538.

It is an arithmetic number, because the mean of its divisors is an integer number (123690).

2^2139475 is an apocalyptic number.

2139475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2139475 is a deficient number, since it is larger than the sum of its proper divisors (829085).

2139475 is a wasteful number, since it uses less digits than its factorization.

2139475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279 (or 274 counting only the distinct ones).

The product of its digits is 7560, while the sum is 31.

The square root of 2139475 is about 1462.6944315201. The cubic root of 2139475 is about 128.8553352951.

It can be divided in two parts, 2139 and 475, that multiplied together give a triangular number (1016025 = T₁₄₂₅).

The spelling of 2139475 in words is "two million, one hundred thirty-nine thousand, four hundred seventy-five".