2154667 has 2 divisors, whose sum is σ = 2154668. Its totient is φ = 2154666.

The previous prime is 2154643. The next prime is 2154683. The reversal of 2154667 is 7664512.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2154667 - 2⁷ = 2154539 is a prime.

It is not a weakly prime, because it can be changed into another prime (2154967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077333 + 1077334.

It is an arithmetic number, because the mean of its divisors is an integer number (1077334).

2^2154667 is an apocalyptic number.

2154667 is a deficient number, since it is larger than the sum of its proper divisors (1).

2154667 is an equidigital number, since it uses as much as digits as its factorization.

2154667 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10080, while the sum is 31.

The square root of 2154667 is about 1467.8784009583. The cubic root of 2154667 is about 129.1596085402.

The spelling of 2154667 in words is "two million, one hundred fifty-four thousand, six hundred sixty-seven".