1111157429 has 2 divisors, whose sum is σ = 1111157430. Its totient is φ = 1111157428.

The previous prime is 1111157423. The next prime is 1111157431. The reversal of 1111157429 is 9247511111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 984076900 + 127080529 = 31370^2 + 11273^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1111157429 is a prime.

Together with 1111157431, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1111157395 and 1111157404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111157423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555578714 + 555578715.

It is an arithmetic number, because the mean of its divisors is an integer number (555578715).

Almost surely, 2^1111157429 is an apocalyptic number.

It is an amenable number.

1111157429 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111157429 is an equidigital number, since it uses as much as digits as its factorization.

1111157429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2520, while the sum is 32.

The square root of 1111157429 is about 33334.0280944263. The cubic root of 1111157429 is about 1035.7585604963.

The spelling of 1111157429 in words is "one billion, one hundred eleven million, one hundred fifty-seven thousand, four hundred twenty-nine".