1240122397 has 2 divisors, whose sum is σ = 1240122398. Its totient is φ = 1240122396.

The previous prime is 1240122383. The next prime is 1240122437. The reversal of 1240122397 is 7932210421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 886907961 + 353214436 = 29781^2 + 18794^2 .

It is a cyclic number.

It is not a de Polignac number, because 1240122397 - 2¹⁵ = 1240089629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1240122337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620061198 + 620061199.

It is an arithmetic number, because the mean of its divisors is an integer number (620061199).

Almost surely, 2^1240122397 is an apocalyptic number.

It is an amenable number.

1240122397 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240122397 is an equidigital number, since it uses as much as digits as its factorization.

1240122397 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1240122397 is about 35215.3716010494. The cubic root of 1240122397 is about 1074.3724181148.

The spelling of 1240122397 in words is "one billion, two hundred forty million, one hundred twenty-two thousand, three hundred ninety-seven".