1122742381 has 2 divisors, whose sum is σ = 1122742382. Its totient is φ = 1122742380.

The previous prime is 1122742367. The next prime is 1122742429. The reversal of 1122742381 is 1832472211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 764246025 + 358496356 = 27645^2 + 18934^2 .

It is a cyclic number.

It is not a de Polignac number, because 1122742381 - 2²⁹ = 585871469 is a prime.

It is a super-2 number, since 2×1122742381² = 2521100908187098322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1122742331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561371190 + 561371191.

It is an arithmetic number, because the mean of its divisors is an integer number (561371191).

Almost surely, 2^1122742381 is an apocalyptic number.

It is an amenable number.

1122742381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1122742381 is an equidigital number, since it uses as much as digits as its factorization.

1122742381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5376, while the sum is 31.

The square root of 1122742381 is about 33507.3481642460. The cubic root of 1122742381 is about 1039.3457364801.

The spelling of 1122742381 in words is "one billion, one hundred twenty-two million, seven hundred forty-two thousand, three hundred eighty-one".