1151323401 has 4 divisors (see below), whose sum is σ = 1535097872. Its totient is φ = 767548932.

The previous prime is 1151323387. The next prime is 1151323451. The reversal of 1151323401 is 1043231511.

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 not a de Polignac number, because 1151323401 - 2⁷ = 1151323273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1151323451) 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, 191887231 + ... + 191887236.

It is an arithmetic number, because the mean of its divisors is an integer number (383774468).

Almost surely, 2^1151323401 is an apocalyptic number.

It is an amenable number.

1151323401 is a deficient number, since it is larger than the sum of its proper divisors (383774471).

1151323401 is an equidigital number, since it uses as much as digits as its factorization.

1151323401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383774470.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 1151323401 is about 33931.1567884150. The cubic root of 1151323401 is about 1048.0912870508.

Adding to 1151323401 its reverse (1043231511), we get a palindrome (2194554912).

The spelling of 1151323401 in words is "one billion, one hundred fifty-one million, three hundred twenty-three thousand, four hundred one".