1151225421 has 8 divisors (see below), whose sum is σ = 1540207200. Its totient is φ = 764863632.

The previous prime is 1151225419. The next prime is 1151225443. The reversal of 1151225421 is 1245221511.

It is a happy number.

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

It is not a de Polignac number, because 1151225421 - 2¹ = 1151225419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1151225391 and 1151225400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1151225461) 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, 653971 + ... + 655728.

It is an arithmetic number, because the mean of its divisors is an integer number (192525900).

Almost surely, 2^1151225421 is an apocalyptic number.

It is an amenable number.

1151225421 is a deficient number, since it is larger than the sum of its proper divisors (388981779).

1151225421 is a wasteful number, since it uses less digits than its factorization.

1151225421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1309995.

The product of its digits is 800, while the sum is 24.

The square root of 1151225421 is about 33929.7129519246. The cubic root of 1151225421 is about 1048.0615546295.

Adding to 1151225421 its reverse (1245221511), we get a palindrome (2396446932).

The spelling of 1151225421 in words is "one billion, one hundred fifty-one million, two hundred twenty-five thousand, four hundred twenty-one".