1149432261 has 12 divisors (see below), whose sum is σ = 1538169408. Its totient is φ = 763501744.

The previous prime is 1149432259. The next prime is 1149432281. The reversal of 1149432261 is 1622349411.

It is not a de Polignac number, because 1149432261 - 2¹ = 1149432259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1149432281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 255316 + ... + 259778.

It is an arithmetic number, because the mean of its divisors is an integer number (128180784).

Almost surely, 2^1149432261 is an apocalyptic number.

It is an amenable number.

1149432261 is a deficient number, since it is larger than the sum of its proper divisors (388737147).

1149432261 is an frugal number, since it uses more digits than its factorization.

1149432261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5052 (or 4759 counting only the distinct ones).

The product of its digits is 10368, while the sum is 33.

The square root of 1149432261 is about 33903.2780273530. The cubic root of 1149432261 is about 1047.5171148731.

The spelling of 1149432261 in words is "one billion, one hundred forty-nine million, four hundred thirty-two thousand, two hundred sixty-one".