1151225391 has 8 divisors (see below), whose sum is σ = 1550791984. Its totient is φ = 759571200.

The previous prime is 1151225377. The next prime is 1151225399. The reversal of 1151225391 is 1935221511.

1151225391 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1151225391 - 2¹⁰ = 1151224367 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 (1151225399) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1977760 + ... + 1978341.

It is an arithmetic number, because the mean of its divisors is an integer number (193848998).

Almost surely, 2^1151225391 is an apocalyptic number.

1151225391 is a deficient number, since it is larger than the sum of its proper divisors (399566593).

1151225391 is an equidigital number, since it uses as much as digits as its factorization.

1151225391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3956201.

The product of its digits is 2700, while the sum is 30.

The square root of 1151225391 is about 33929.7125098342. The cubic root of 1151225391 is about 1048.0615455256.

The spelling of 1151225391 in words is "one billion, one hundred fifty-one million, two hundred twenty-five thousand, three hundred ninety-one".