1161277372 has 12 divisors (see below), whose sum is σ = 2039173416. Its totient is φ = 578656400.

The previous prime is 1161277343. The next prime is 1161277409. The reversal of 1161277372 is 2737721611.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 494254 + ... + 496597.

It is an arithmetic number, because the mean of its divisors is an integer number (169931118).

Almost surely, 2^1161277372 is an apocalyptic number.

It is an amenable number.

1161277372 is a deficient number, since it is larger than the sum of its proper divisors (877896044).

1161277372 is a wasteful number, since it uses less digits than its factorization.

1161277372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 991148 (or 991146 counting only the distinct ones).

The product of its digits is 24696, while the sum is 37.

The square root of 1161277372 is about 34077.5200388761. The cubic root of 1161277372 is about 1051.1031103771.

Adding to 1161277372 its reverse (2737721611), we get a palindrome (3898998983).

The spelling of 1161277372 in words is "one billion, one hundred sixty-one million, two hundred seventy-seven thousand, three hundred seventy-two".