2154651 has 8 divisors (see below), whose sum is σ = 2879760. Its totient is φ = 1432992.

The previous prime is 2154643. The next prime is 2154667. The reversal of 2154651 is 1564512.

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

It is not a de Polignac number, because 2154651 - 2³ = 2154643 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2154611) 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, 1621 + ... + 2633.

It is an arithmetic number, because the mean of its divisors is an integer number (359970).

2^2154651 is an apocalyptic number.

2154651 is a deficient number, since it is larger than the sum of its proper divisors (725109).

2154651 is a wasteful number, since it uses less digits than its factorization.

2154651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1725.

The product of its digits is 1200, while the sum is 24.

The square root of 2154651 is about 1467.8729509055. The cubic root of 2154651 is about 129.1592888375.

The spelling of 2154651 in words is "two million, one hundred fifty-four thousand, six hundred fifty-one".