2149157 has 4 divisors (see below), whose sum is σ = 2275596. Its totient is φ = 2022720.

The previous prime is 2149151. The next prime is 2149171. The reversal of 2149157 is 7519412.

It is a Cunningham number, because it is equal to 1466²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1674436 + 474721 = 1294^2 + 689^2 .

It is a cyclic number.

It is not a de Polignac number, because 2149157 - 2⁴ = 2149141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2149151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63194 + ... + 63227.

It is an arithmetic number, because the mean of its divisors is an integer number (568899).

2^2149157 is an apocalyptic number.

It is an amenable number.

2149157 is a deficient number, since it is larger than the sum of its proper divisors (126439).

2149157 is a wasteful number, since it uses less digits than its factorization.

2149157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126438.

The product of its digits is 2520, while the sum is 29.

The square root of 2149157 is about 1466.0003410641. Note that the first 3 decimals coincide. The cubic root of 2149157 is about 129.0494171985.

The spelling of 2149157 in words is "two million, one hundred forty-nine thousand, one hundred fifty-seven".