1155427547 has 4 divisors (see below), whose sum is σ = 1160031096. Its totient is φ = 1150824000.

The previous prime is 1155427513. The next prime is 1155427549. The reversal of 1155427547 is 7457245511.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1155427547 - 2¹⁶ = 1155362011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1155427549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2301398 + ... + 2301899.

It is an arithmetic number, because the mean of its divisors is an integer number (290007774).

Almost surely, 2^1155427547 is an apocalyptic number.

1155427547 is a deficient number, since it is larger than the sum of its proper divisors (4603549).

1155427547 is an equidigital number, since it uses as much as digits as its factorization.

1155427547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4603548.

The product of its digits is 196000, while the sum is 41.

The square root of 1155427547 is about 33991.5805310668. The cubic root of 1155427547 is about 1049.3351942854.

The spelling of 1155427547 in words is "one billion, one hundred fifty-five million, four hundred twenty-seven thousand, five hundred forty-seven".