2150661 has 16 divisors (see below), whose sum is σ = 3041280. Its totient is φ = 1349040.

The previous prime is 2150657. The next prime is 2150663. The reversal of 2150661 is 1660512.

It is a happy number.

It is not a de Polignac number, because 2150661 - 2² = 2150657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2150663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4680 + ... + 5118.

It is an arithmetic number, because the mean of its divisors is an integer number (190080).

2^2150661 is an apocalyptic number.

It is an amenable number.

2150661 is a deficient number, since it is larger than the sum of its proper divisors (890619).

2150661 is a wasteful number, since it uses less digits than its factorization.

2150661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 2150661 is about 1466.5132116691. The cubic root of 2150661 is about 129.0795135054.

The spelling of 2150661 in words is "two million, one hundred fifty thousand, six hundred sixty-one".