1121745413 has 2 divisors, whose sum is σ = 1121745414. Its totient is φ = 1121745412.

The previous prime is 1121745403. The next prime is 1121745421. The reversal of 1121745413 is 3145471211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 910711684 + 211033729 = 30178^2 + 14527^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121745413 - 2¹² = 1121741317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121745403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560872706 + 560872707.

It is an arithmetic number, because the mean of its divisors is an integer number (560872707).

Almost surely, 2^1121745413 is an apocalyptic number.

It is an amenable number.

1121745413 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121745413 is an equidigital number, since it uses as much as digits as its factorization.

1121745413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3360, while the sum is 29.

The square root of 1121745413 is about 33492.4680040155. The cubic root of 1121745413 is about 1039.0380074426.

The spelling of 1121745413 in words is "one billion, one hundred twenty-one million, seven hundred forty-five thousand, four hundred thirteen".