1115547401 has 2 divisors, whose sum is σ = 1115547402. Its totient is φ = 1115547400.

The previous prime is 1115547353. The next prime is 1115547427. The reversal of 1115547401 is 1047455111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1040707600 + 74839801 = 32260^2 + 8651^2 .

It is an emirp because it is prime and its reverse (1047455111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1115547401 - 2²² = 1111353097 is a prime.

It is not a weakly prime, because it can be changed into another prime (1115540401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 557773700 + 557773701.

It is an arithmetic number, because the mean of its divisors is an integer number (557773701).

Almost surely, 2^1115547401 is an apocalyptic number.

It is an amenable number.

1115547401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1115547401 is an equidigital number, since it uses as much as digits as its factorization.

1115547401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2800, while the sum is 29.

The square root of 1115547401 is about 33399.8113916830. The cubic root of 1115547401 is about 1037.1207965524.

The spelling of 1115547401 in words is "one billion, one hundred fifteen million, five hundred forty-seven thousand, four hundred one".