406754921 has 2 divisors, whose sum is σ = 406754922. Its totient is φ = 406754920.

The previous prime is 406754911. The next prime is 406754939. The reversal of 406754921 is 129457604.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 254849296 + 151905625 = 15964^2 + 12325^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-406754921 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (406754911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203377460 + 203377461.

It is an arithmetic number, because the mean of its divisors is an integer number (203377461).

Almost surely, 2^406754921 is an apocalyptic number.

It is an amenable number.

406754921 is a deficient number, since it is larger than the sum of its proper divisors (1).

406754921 is an equidigital number, since it uses as much as digits as its factorization.

406754921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 406754921 is about 20168.1660296617. The cubic root of 406754921 is about 740.9307262696.

The spelling of 406754921 in words is "four hundred six million, seven hundred fifty-four thousand, nine hundred twenty-one".