2139970 has 32 divisors (see below), whose sum is σ = 4636800. Its totient is φ = 694656.

The previous prime is 2139967. The next prime is 2139979. The reversal of 2139970 is 799312.

It is a super-3 number, since 3×2139970³ = 29399795525333919000, which contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (2139979) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 526 + ... + 2134.

It is an arithmetic number, because the mean of its divisors is an integer number (144900).

2^2139970 is an apocalyptic number.

2139970 is an abundant number, since it is smaller than the sum of its proper divisors (2496830).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2139970 is a wasteful number, since it uses less digits than its factorization.

2139970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1642.

The product of its (nonzero) digits is 3402, while the sum is 31.

The square root of 2139970 is about 1462.8636300079. The cubic root of 2139970 is about 128.8652720744.

The spelling of 2139970 in words is "two million, one hundred thirty-nine thousand, nine hundred seventy".