1454747221 has 2 divisors, whose sum is σ = 1454747222. Its totient is φ = 1454747220.

The previous prime is 1454747219. The next prime is 1454747227. The reversal of 1454747221 is 1227474541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 879419025 + 575328196 = 29655^2 + 23986^2 .

It is a cyclic number.

It is not a de Polignac number, because 1454747221 - 2¹ = 1454747219 is a prime.

Together with 1454747219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1454747227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 727373610 + 727373611.

It is an arithmetic number, because the mean of its divisors is an integer number (727373611).

Almost surely, 2^1454747221 is an apocalyptic number.

It is an amenable number.

1454747221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1454747221 is an equidigital number, since it uses as much as digits as its factorization.

1454747221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62720, while the sum is 37.

The square root of 1454747221 is about 38141.1486586338. The cubic root of 1454747221 is about 1133.0850567930.

The spelling of 1454747221 in words is "one billion, four hundred fifty-four million, seven hundred forty-seven thousand, two hundred twenty-one".