1222540379 has 2 divisors, whose sum is σ = 1222540380. Its totient is φ = 1222540378.

The previous prime is 1222540301. The next prime is 1222540399. The reversal of 1222540379 is 9730452221.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1222540379 - 2¹⁶ = 1222474843 is a prime.

It is not a weakly prime, because it can be changed into another prime (1222540399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611270189 + 611270190.

It is an arithmetic number, because the mean of its divisors is an integer number (611270190).

Almost surely, 2^1222540379 is an apocalyptic number.

1222540379 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222540379 is an equidigital number, since it uses as much as digits as its factorization.

1222540379 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 1222540379 is about 34964.8449017009. The cubic root of 1222540379 is about 1069.2708745669.

The spelling of 1222540379 in words is "one billion, two hundred twenty-two million, five hundred forty thousand, three hundred seventy-nine".