1151204421 has 12 divisors (see below), whose sum is σ = 1577550912. Its totient is φ = 746724528.

The previous prime is 1151204413. The next prime is 1151204423. The reversal of 1151204421 is 1244021511.

It is not a de Polignac number, because 1151204421 - 2³ = 1151204413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1151204423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 136045 + ... + 144258.

It is an arithmetic number, because the mean of its divisors is an integer number (131462576).

Almost surely, 2^1151204421 is an apocalyptic number.

It is an amenable number.

1151204421 is a deficient number, since it is larger than the sum of its proper divisors (426346491).

1151204421 is an equidigital number, since it uses as much as digits as its factorization.

1151204421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280380 (or 280343 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 1151204421 is about 33929.4034872410. The cubic root of 1151204421 is about 1048.0551818762.

Adding to 1151204421 its reverse (1244021511), we get a palindrome (2395225932).

The spelling of 1151204421 in words is "one billion, one hundred fifty-one million, two hundred four thousand, four hundred twenty-one".