2157029 has 6 divisors (see below), whose sum is σ = 2509254. Its totient is φ = 1848840.

The previous prime is 2157017. The next prime is 2157031. The reversal of 2157029 is 9207512.

2157029 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1768900 + 388129 = 1330^2 + 623^2 .

It is not a de Polignac number, because 2157029 - 2²⁰ = 1108453 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2156989 and 2157007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2157229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21962 + ... + 22059.

It is an arithmetic number, because the mean of its divisors is an integer number (418209).

2^2157029 is an apocalyptic number.

It is an amenable number.

2157029 is a deficient number, since it is larger than the sum of its proper divisors (352225).

2157029 is an equidigital number, since it uses as much as digits as its factorization.

2157029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44035 (or 44028 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 2157029 is about 1468.6827431409. The cubic root of 2157029 is about 129.2067873055.

The spelling of 2157029 in words is "two million, one hundred fifty-seven thousand, twenty-nine".