1145721352 has 16 divisors (see below), whose sum is σ = 2188760940. Its totient is φ = 562051776.

The previous prime is 1145721323. The next prime is 1145721359. The reversal of 1145721352 is 2531275411.

It can be written as a sum of positive squares in 2 ways, for example, as 1015441956 + 130279396 = 31866^2 + 11414^2 .

It is not an unprimeable number, because it can be changed into a prime (1145721359) 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, 1350663 + ... + 1351510.

Almost surely, 2^1145721352 is an apocalyptic number.

It is an amenable number.

1145721352 is a deficient number, since it is larger than the sum of its proper divisors (1043039588).

1145721352 is a wasteful number, since it uses less digits than its factorization.

1145721352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2702232 (or 2702228 counting only the distinct ones).

The product of its digits is 8400, while the sum is 31.

The square root of 1145721352 is about 33848.5059049879. The cubic root of 1145721352 is about 1046.3886065877.

Adding to 1145721352 its reverse (2531275411), we get a palindrome (3676996763).

The spelling of 1145721352 in words is "one billion, one hundred forty-five million, seven hundred twenty-one thousand, three hundred fifty-two".