1306621630 has 16 divisors (see below), whose sum is σ = 2359438704. Its totient is φ = 520977600.

The previous prime is 1306621627. The next prime is 1306621669. The reversal of 1306621630 is 361266031.

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 7 ways as a sum of consecutive naturals, for example, 205596 + ... + 211855.

It is an arithmetic number, because the mean of its divisors is an integer number (147464919).

Almost surely, 2^1306621630 is an apocalyptic number.

1306621630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1306621630 is a deficient number, since it is larger than the sum of its proper divisors (1052817074).

1306621630 is a wasteful number, since it uses less digits than its factorization.

1306621630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417771.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 1306621630 is about 36147.2216083062. The cubic root of 1306621630 is about 1093.2427713714.

Adding to 1306621630 its reverse (361266031), we get a palindrome (1667887661).

The spelling of 1306621630 in words is "one billion, three hundred six million, six hundred twenty-one thousand, six hundred thirty".