2129970 has 16 divisors (see below), whose sum is σ = 5112000. Its totient is φ = 567984.

The previous prime is 2129951. The next prime is 2129971. The reversal of 2129970 is 799212.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 70999 = 2129970 / (2 + 1 + 2 + 9 + 9 + 7 + 0).

It is not an unprimeable number, because it can be changed into a prime (2129971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35470 + ... + 35529.

It is an arithmetic number, because the mean of its divisors is an integer number (319500).

2^2129970 is an apocalyptic number.

2129970 is an abundant number, since it is smaller than the sum of its proper divisors (2982030).

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

2129970 is a wasteful number, since it uses less digits than its factorization.

2129970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71009.

The product of its (nonzero) digits is 2268, while the sum is 30.

The square root of 2129970 is about 1459.4416740658. The cubic root of 2129970 is about 128.6642310593.

The spelling of 2129970 in words is "two million, one hundred twenty-nine thousand, nine hundred seventy".