1308621642 has 16 divisors (see below), whose sum is σ = 2619575040. Its totient is φ = 435818592.

The previous prime is 1308621619. The next prime is 1308621647. The reversal of 1308621642 is 2461268031.

It is not an unprimeable number, because it can be changed into a prime (1308621647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89818 + ... + 103365.

It is an arithmetic number, because the mean of its divisors is an integer number (163723440).

Almost surely, 2^1308621642 is an apocalyptic number.

1308621642 is an abundant number, since it is smaller than the sum of its proper divisors (1310953398).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1308621642 is a wasteful number, since it uses less digits than its factorization.

1308621642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194317.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 1308621642 is about 36174.8758394552. The cubic root of 1308621642 is about 1093.8002865065.

Adding to 1308621642 its reverse (2461268031), we get a palindrome (3769889673).

The spelling of 1308621642 in words is "one billion, three hundred eight million, six hundred twenty-one thousand, six hundred forty-two".