1381321450 has 36 divisors (see below), whose sum is σ = 2599666758. Its totient is φ = 546012000.

The previous prime is 1381321433. The next prime is 1381321463. The reversal of 1381321450 is 541231831.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1302271569 + 79049881 = 36087^2 + 8891^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2640889 + ... + 2641411.

Almost surely, 2^1381321450 is an apocalyptic number.

1381321450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1381321450 is a deficient number, since it is larger than the sum of its proper divisors (1218345308).

1381321450 is an equidigital number, since it uses as much as digits as its factorization.

1381321450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1159 (or 631 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 1381321450 is about 37166.1331052882. The cubic root of 1381321450 is about 1113.6915348735.

The spelling of 1381321450 in words is "one billion, three hundred eighty-one million, three hundred twenty-one thousand, four hundred fifty".