1455220979 has 2 divisors, whose sum is σ = 1455220980. Its totient is φ = 1455220978.

The previous prime is 1455220969. The next prime is 1455220993. The reversal of 1455220979 is 9790225541.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1455220979 - 2¹² = 1455216883 is a prime.

It is not a weakly prime, because it can be changed into another prime (1455220919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 727610489 + 727610490.

It is an arithmetic number, because the mean of its divisors is an integer number (727610490).

Almost surely, 2^1455220979 is an apocalyptic number.

1455220979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1455220979 is an equidigital number, since it uses as much as digits as its factorization.

1455220979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 226800, while the sum is 44.

The square root of 1455220979 is about 38147.3587421200. The cubic root of 1455220979 is about 1133.2080449063.

The spelling of 1455220979 in words is "one billion, four hundred fifty-five million, two hundred twenty thousand, nine hundred seventy-nine".