1150421999 has 2 divisors, whose sum is σ = 1150422000. Its totient is φ = 1150421998.

The previous prime is 1150421983. The next prime is 1150422001. The reversal of 1150421999 is 9991240511.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1150421999 - 2⁴ = 1150421983 is a prime.

Together with 1150422001, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1150421929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 575210999 + 575211000.

It is an arithmetic number, because the mean of its divisors is an integer number (575211000).

Almost surely, 2^1150421999 is an apocalyptic number.

1150421999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1150421999 is an equidigital number, since it uses as much as digits as its factorization.

1150421999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29160, while the sum is 41.

The square root of 1150421999 is about 33917.8713807338. The cubic root of 1150421999 is about 1047.8176893672.

The spelling of 1150421999 in words is "one billion, one hundred fifty million, four hundred twenty-one thousand, nine hundred ninety-nine".