1149962721 has 4 divisors (see below), whose sum is σ = 1533283632. Its totient is φ = 766641812.

The previous prime is 1149962719. The next prime is 1149962729. The reversal of 1149962721 is 1272699411.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1149962721 - 2¹ = 1149962719 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1149962729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191660451 + ... + 191660456.

It is an arithmetic number, because the mean of its divisors is an integer number (383320908).

Almost surely, 2^1149962721 is an apocalyptic number.

It is an amenable number.

1149962721 is a deficient number, since it is larger than the sum of its proper divisors (383320911).

1149962721 is an equidigital number, since it uses as much as digits as its factorization.

1149962721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383320910.

The product of its digits is 54432, while the sum is 42.

The square root of 1149962721 is about 33911.1002623035. The cubic root of 1149962721 is about 1047.6782322323.

The spelling of 1149962721 in words is "one billion, one hundred forty-nine million, nine hundred sixty-two thousand, seven hundred twenty-one".