1121342549 has 2 divisors, whose sum is σ = 1121342550. Its totient is φ = 1121342548.

The previous prime is 1121342543. The next prime is 1121342567. The reversal of 1121342549 is 9452431211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 771839524 + 349503025 = 27782^2 + 18695^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121342549 - 2⁸ = 1121342293 is a prime.

It is a super-2 number, since 2×1121342549² = 2514818224395634802, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121342543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560671274 + 560671275.

It is an arithmetic number, because the mean of its divisors is an integer number (560671275).

Almost surely, 2^1121342549 is an apocalyptic number.

It is an amenable number.

1121342549 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121342549 is an equidigital number, since it uses as much as digits as its factorization.

1121342549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 32.

The square root of 1121342549 is about 33486.4532161888. The cubic root of 1121342549 is about 1038.9136057367.

The spelling of 1121342549 in words is "one billion, one hundred twenty-one million, three hundred forty-two thousand, five hundred forty-nine".