1117278541 has 2 divisors, whose sum is σ = 1117278542. Its totient is φ = 1117278540.

The previous prime is 1117278523. The next prime is 1117278551. The reversal of 1117278541 is 1458727111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 786802500 + 330476041 = 28050^2 + 18179^2 .

It is an emirp because it is prime and its reverse (1458727111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1117278541 - 2⁵ = 1117278509 is a prime.

It is a super-2 number, since 2×1117278541² = 2496622676358177362, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1117278541.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1117278511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 558639270 + 558639271.

It is an arithmetic number, because the mean of its divisors is an integer number (558639271).

Almost surely, 2^1117278541 is an apocalyptic number.

It is an amenable number.

1117278541 is a deficient number, since it is larger than the sum of its proper divisors (1).

1117278541 is an equidigital number, since it uses as much as digits as its factorization.

1117278541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15680, while the sum is 37.

The square root of 1117278541 is about 33425.7167612005. The cubic root of 1117278541 is about 1037.6569976959.

The spelling of 1117278541 in words is "one billion, one hundred seventeen million, two hundred seventy-eight thousand, five hundred forty-one".