2154279 has 4 divisors (see below), whose sum is σ = 2872376. Its totient is φ = 1436184.

The previous prime is 2154259. The next prime is 2154281. The reversal of 2154279 is 9724512.

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

It is not a de Polignac number, because 2154279 - 2¹¹ = 2152231 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2154209) 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, 359044 + ... + 359049.

It is an arithmetic number, because the mean of its divisors is an integer number (718094).

2^2154279 is an apocalyptic number.

2154279 is a deficient number, since it is larger than the sum of its proper divisors (718097).

2154279 is an equidigital number, since it uses as much as digits as its factorization.

2154279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718096.

The product of its digits is 5040, while the sum is 30.

The square root of 2154279 is about 1467.7462314719. The cubic root of 2154279 is about 129.1518553025.

The spelling of 2154279 in words is "two million, one hundred fifty-four thousand, two hundred seventy-nine".