1242012379 has 2 divisors, whose sum is σ = 1242012380. Its totient is φ = 1242012378.

The previous prime is 1242012371. The next prime is 1242012391. The reversal of 1242012379 is 9732102421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1242012379 - 2³ = 1242012371 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1242012379.

It is not a weakly prime, because it can be changed into another prime (1242012371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621006189 + 621006190.

It is an arithmetic number, because the mean of its divisors is an integer number (621006190).

Almost surely, 2^1242012379 is an apocalyptic number.

1242012379 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242012379 is an equidigital number, since it uses as much as digits as its factorization.

1242012379 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 1242012379 is about 35242.1960013845. The cubic root of 1242012379 is about 1074.9179325127.

The spelling of 1242012379 in words is "one billion, two hundred forty-two million, twelve thousand, three hundred seventy-nine".