1321639010 has 8 divisors (see below), whose sum is σ = 2378950236. Its totient is φ = 528655600.

The previous prime is 1321639003. The next prime is 1321639019. The reversal of 1321639010 is 109361231.

It can be written as a sum of positive squares in 2 ways, for example, as 1234608769 + 87030241 = 35137^2 + 9329^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1321639019) 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, 66081941 + ... + 66081960.

Almost surely, 2^1321639010 is an apocalyptic number.

1321639010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1321639010 is a deficient number, since it is larger than the sum of its proper divisors (1057311226).

1321639010 is a wasteful number, since it uses less digits than its factorization.

1321639010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132163908.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 1321639010 is about 36354.3533844298. The cubic root of 1321639010 is about 1097.4151455679.

The spelling of 1321639010 in words is "one billion, three hundred twenty-one million, six hundred thirty-nine thousand, ten".