1155320501 has 4 divisors (see below), whose sum is σ = 1160114604. Its totient is φ = 1150526400.

The previous prime is 1155320483. The next prime is 1155320519. The reversal of 1155320501 is 1050235511.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (1155320483) and next prime (1155320519).

It can be written as a sum of positive squares in 2 ways, for example, as 765850276 + 389470225 = 27674^2 + 19735^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1155320501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155310501) 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, 2396690 + ... + 2397171.

It is an arithmetic number, because the mean of its divisors is an integer number (290028651).

Almost surely, 2^1155320501 is an apocalyptic number.

It is an amenable number.

1155320501 is a deficient number, since it is larger than the sum of its proper divisors (4794103).

1155320501 is an equidigital number, since it uses as much as digits as its factorization.

1155320501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4794102.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 1155320501 is about 33990.0058987933. The cubic root of 1155320501 is about 1049.3027876366.

The spelling of 1155320501 in words is "one billion, one hundred fifty-five million, three hundred twenty thousand, five hundred one".