921054257 has 2 divisors, whose sum is σ = 921054258. Its totient is φ = 921054256.

The previous prime is 921054227. The next prime is 921054269. The reversal of 921054257 is 752450129.

921054257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 840072256 + 80982001 = 28984^2 + 8999^2 .

It is a cyclic number.

It is not a de Polignac number, because 921054257 - 2¹² = 921050161 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (921054227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460527128 + 460527129.

It is an arithmetic number, because the mean of its divisors is an integer number (460527129).

Almost surely, 2^921054257 is an apocalyptic number.

It is an amenable number.

921054257 is a deficient number, since it is larger than the sum of its proper divisors (1).

921054257 is an equidigital number, since it uses as much as digits as its factorization.

921054257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 921054257 is about 30348.8757122896. The cubic root of 921054257 is about 972.9601911333.

The spelling of 921054257 in words is "nine hundred twenty-one million, fifty-four thousand, two hundred fifty-seven".