1231321450 has 24 divisors (see below), whose sum is σ = 2310536268. Its totient is φ = 488167680.

The previous prime is 1231321381. The next prime is 1231321451. The reversal of 1231321450 is 541231321.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 354154761 + 877166689 = 18819^2 + 29617^2 .

It is a super-3 number, since 3×1231321450³ (a number of 28 digits) contains 333 as substring.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (1231321451) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 103317 + ... + 114616.

Almost surely, 2^1231321450 is an apocalyptic number.

1231321450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1231321450 is a deficient number, since it is larger than the sum of its proper divisors (1079214818).

1231321450 is a wasteful number, since it uses less digits than its factorization.

1231321450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218058 (or 218053 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1231321450 is about 35090.1902246198. The cubic root of 1231321450 is about 1071.8248331940.

Adding to 1231321450 its reverse (541231321), we get a palindrome (1772552771).

The spelling of 1231321450 in words is "one billion, two hundred thirty-one million, three hundred twenty-one thousand, four hundred fifty".