1240022981 has 2 divisors, whose sum is σ = 1240022982. Its totient is φ = 1240022980.

The previous prime is 1240022951. The next prime is 1240023053. The reversal of 1240022981 is 1892200421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1236928900 + 3094081 = 35170^2 + 1759^2 .

It is an emirp because it is prime and its reverse (1892200421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1240022981 - 2²⁶ = 1172914117 is a prime.

It is a super-2 number, since 2×1240022981² = 3075313986816252722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1240022911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620011490 + 620011491.

It is an arithmetic number, because the mean of its divisors is an integer number (620011491).

Almost surely, 2^1240022981 is an apocalyptic number.

It is an amenable number.

1240022981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240022981 is an equidigital number, since it uses as much as digits as its factorization.

1240022981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 1240022981 is about 35213.9600300790. The cubic root of 1240022981 is about 1074.3437078674.

The spelling of 1240022981 in words is "one billion, two hundred forty million, twenty-two thousand, nine hundred eighty-one".