1155265415 has 4 divisors (see below), whose sum is σ = 1386318504. Its totient is φ = 924212328.

The previous prime is 1155265387. The next prime is 1155265421. The reversal of 1155265415 is 5145625511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5145625511 = 13 ⋅395817347.

It is a cyclic number.

It is not a de Polignac number, because 1155265415 - 2⁶ = 1155265351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115526537 + ... + 115526546.

It is an arithmetic number, because the mean of its divisors is an integer number (346579626).

Almost surely, 2^1155265415 is an apocalyptic number.

1155265415 is a deficient number, since it is larger than the sum of its proper divisors (231053089).

1155265415 is an equidigital number, since it uses as much as digits as its factorization.

1155265415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231053088.

The product of its digits is 30000, while the sum is 35.

The square root of 1155265415 is about 33989.1955627079. The cubic root of 1155265415 is about 1049.2861103561.

It can be divided in two parts, 11552 and 65415, that added together give a palindrome (76967).

The spelling of 1155265415 in words is "one billion, one hundred fifty-five million, two hundred sixty-five thousand, four hundred fifteen".