2149851 has 8 divisors (see below), whose sum is σ = 3127104. Its totient is φ = 1302920.

The previous prime is 2149813. The next prime is 2149853. The reversal of 2149851 is 1589412.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2149851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2149853) 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, 32541 + ... + 32606.

It is an arithmetic number, because the mean of its divisors is an integer number (390888).

2^2149851 is an apocalyptic number.

2149851 is a deficient number, since it is larger than the sum of its proper divisors (977253).

2149851 is a wasteful number, since it uses less digits than its factorization.

2149851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65161.

The product of its digits is 2880, while the sum is 30.

The square root of 2149851 is about 1466.2370204029. The cubic root of 2149851 is about 129.0633064672.

The spelling of 2149851 in words is "two million, one hundred forty-nine thousand, eight hundred fifty-one".