2921147 has 2 divisors, whose sum is σ = 2921148. Its totient is φ = 2921146.

The previous prime is 2921137. The next prime is 2921173. The reversal of 2921147 is 7411292.

It is an a-pointer prime, because the next prime (2921173) can be obtained adding 2921147 to its sum of digits (26).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2921147 - 2⁴ = 2921131 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (2921137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1460573 + 1460574.

It is an arithmetic number, because the mean of its divisors is an integer number (1460574).

2^2921147 is an apocalyptic number.

2921147 is a deficient number, since it is larger than the sum of its proper divisors (1).

2921147 is an equidigital number, since it uses as much as digits as its factorization.

2921147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1008, while the sum is 26.

The square root of 2921147 is about 1709.1363316014. The cubic root of 2921147 is about 142.9501024013.

The spelling of 2921147 in words is "two million, nine hundred twenty-one thousand, one hundred forty-seven".