1155376087 has 4 divisors (see below), whose sum is σ = 1155791376. Its totient is φ = 1154960800.

The previous prime is 1155376081. The next prime is 1155376091. The reversal of 1155376087 is 7806735511.

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 1155376087 - 2¹⁹ = 1154851799 is a prime.

It is a super-2 number, since 2×1155376087² = 2669787804822863138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155376081) 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, 203443 + ... + 209044.

It is an arithmetic number, because the mean of its divisors is an integer number (288947844).

Almost surely, 2^1155376087 is an apocalyptic number.

1155376087 is a deficient number, since it is larger than the sum of its proper divisors (415289).

1155376087 is an equidigital number, since it uses as much as digits as its factorization.

1155376087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415288.

The product of its (nonzero) digits is 176400, while the sum is 43.

The square root of 1155376087 is about 33990.8235704874. The cubic root of 1155376087 is about 1049.3196157546.

The spelling of 1155376087 in words is "one billion, one hundred fifty-five million, three hundred seventy-six thousand, eighty-seven".