1155990601 has 2 divisors, whose sum is σ = 1155990602. Its totient is φ = 1155990600.

The previous prime is 1155990523. The next prime is 1155990623. The reversal of 1155990601 is 1060995511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 907455376 + 248535225 = 30124^2 + 15765^2 .

It is a cyclic number.

It is not a de Polignac number, because 1155990601 - 2¹³ = 1155982409 is a prime.

It is not a weakly prime, because it can be changed into another prime (1155990631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577995300 + 577995301.

It is an arithmetic number, because the mean of its divisors is an integer number (577995301).

Almost surely, 2^1155990601 is an apocalyptic number.

It is an amenable number.

1155990601 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155990601 is an equidigital number, since it uses as much as digits as its factorization.

1155990601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12150, while the sum is 37.

The square root of 1155990601 is about 33999.8617791308. The cubic root of 1155990601 is about 1049.5056179041.

The spelling of 1155990601 in words is "one billion, one hundred fifty-five million, nine hundred ninety thousand, six hundred one".