1283157121 has 2 divisors, whose sum is σ = 1283157122. Its totient is φ = 1283157120.

The previous prime is 1283157107. The next prime is 1283157173. The reversal of 1283157121 is 1217513821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 965034225 + 318122896 = 31065^2 + 17836^2 .

It is a cyclic number.

It is not a de Polignac number, because 1283157121 - 2⁷ = 1283156993 is a prime.

It is not a weakly prime, because it can be changed into another prime (1283157221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 641578560 + 641578561.

It is an arithmetic number, because the mean of its divisors is an integer number (641578561).

Almost surely, 2^1283157121 is an apocalyptic number.

It is an amenable number.

1283157121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1283157121 is an equidigital number, since it uses as much as digits as its factorization.

1283157121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3360, while the sum is 31.

The square root of 1283157121 is about 35821.1825740022. The cubic root of 1283157121 is about 1086.6589954649.

It can be divided in two parts, 1283 and 157121, that added together give a square (158404 = 398²).

The spelling of 1283157121 in words is "one billion, two hundred eighty-three million, one hundred fifty-seven thousand, one hundred twenty-one".