1150251721 has 2 divisors, whose sum is σ = 1150251722. Its totient is φ = 1150251720.

The previous prime is 1150251701. The next prime is 1150251743. The reversal of 1150251721 is 1271520511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1026241225 + 124010496 = 32035^2 + 11136^2 .

It is an emirp because it is prime and its reverse (1271520511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1150251721 - 2¹⁹ = 1149727433 is a prime.

It is not a weakly prime, because it can be changed into another prime (1150251701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 575125860 + 575125861.

It is an arithmetic number, because the mean of its divisors is an integer number (575125861).

Almost surely, 2^1150251721 is an apocalyptic number.

It is an amenable number.

1150251721 is a deficient number, since it is larger than the sum of its proper divisors (1).

1150251721 is an equidigital number, since it uses as much as digits as its factorization.

1150251721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 700, while the sum is 25.

The square root of 1150251721 is about 33915.3611362167. The cubic root of 1150251721 is about 1047.7659897578.

The spelling of 1150251721 in words is "one billion, one hundred fifty million, two hundred fifty-one thousand, seven hundred twenty-one".