2139471 has 12 divisors (see below), whose sum is σ = 3126240. Its totient is φ = 1409760.

The previous prime is 2139463. The next prime is 2139481. The reversal of 2139471 is 1749312.

It is not a de Polignac number, because 2139471 - 2³ = 2139463 is a prime.

It is a super-3 number, since 3×2139471³ = 29379233913693552333, which contains 333 as substring.

2139471 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2139461) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 535 + ... + 2136.

It is an arithmetic number, because the mean of its divisors is an integer number (260520).

2^2139471 is an apocalyptic number.

2139471 is a deficient number, since it is larger than the sum of its proper divisors (986769).

2139471 is a wasteful number, since it uses less digits than its factorization.

2139471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2766 (or 2763 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 2139471 is about 1462.6930641799. The cubic root of 2139471 is about 128.8552549917.

The spelling of 2139471 in words is "two million, one hundred thirty-nine thousand, four hundred seventy-one".