1155401501 has 2 divisors, whose sum is σ = 1155401502. Its totient is φ = 1155401500.

The previous prime is 1155401497. The next prime is 1155401551. The reversal of 1155401501 is 1051045511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 843031225 + 312370276 = 29035^2 + 17674^2 .

It is a cyclic number.

It is not a de Polignac number, because 1155401501 - 2² = 1155401497 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1155401551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577700750 + 577700751.

It is an arithmetic number, because the mean of its divisors is an integer number (577700751).

Almost surely, 2^1155401501 is an apocalyptic number.

It is an amenable number.

1155401501 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155401501 is an equidigital number, since it uses as much as digits as its factorization.

1155401501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 500, while the sum is 23.

The square root of 1155401501 is about 33991.1974046223. The cubic root of 1155401501 is about 1049.3273094149.

The spelling of 1155401501 in words is "one billion, one hundred fifty-five million, four hundred one thousand, five hundred one".