2139571 has 8 divisors (see below), whose sum is σ = 2574080. Its totient is φ = 1737288.

The previous prime is 2139563. The next prime is 2139583. The reversal of 2139571 is 1759312.

2139571 = T₂₄₅ + T₂₄₆ + ... + T₃₀₁.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2139571 - 2³ = 2139563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2139521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7911 + ... + 8176.

It is an arithmetic number, because the mean of its divisors is an integer number (321760).

2^2139571 is an apocalyptic number.

2139571 is a deficient number, since it is larger than the sum of its proper divisors (434509).

2139571 is a wasteful number, since it uses less digits than its factorization.

2139571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16113.

The product of its digits is 1890, while the sum is 28.

The square root of 2139571 is about 1462.7272473021. The cubic root of 2139571 is about 128.8572625479.

The spelling of 2139571 in words is "two million, one hundred thirty-nine thousand, five hundred seventy-one".