1152155401 has 4 divisors (see below), whose sum is σ = 1153904400. Its totient is φ = 1150406404.

The previous prime is 1152155387. The next prime is 1152155419. The reversal of 1152155401 is 1045512511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1152155401 - 2⁵ = 1152155369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1152155461) 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, 873511 + ... + 874828.

It is an arithmetic number, because the mean of its divisors is an integer number (288476100).

Almost surely, 2^1152155401 is an apocalyptic number.

It is an amenable number.

1152155401 is a deficient number, since it is larger than the sum of its proper divisors (1748999).

1152155401 is an equidigital number, since it uses as much as digits as its factorization.

1152155401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1748998.

The product of its (nonzero) digits is 1000, while the sum is 25.

The square root of 1152155401 is about 33943.4146926911. The cubic root of 1152155401 is about 1048.3436928134.

Adding to 1152155401 its reverse (1045512511), we get a palindrome (2197667912).

The spelling of 1152155401 in words is "one billion, one hundred fifty-two million, one hundred fifty-five thousand, four hundred one".