1306454642 has 4 divisors (see below), whose sum is σ = 1959681966. Its totient is φ = 653227320.

The previous prime is 1306454621. The next prime is 1306454659. The reversal of 1306454642 is 2464546031.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1243902361 + 62552281 = 35269^2 + 7909^2 .

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 as a sum of consecutive naturals, namely, 326613659 + ... + 326613662.

Almost surely, 2^1306454642 is an apocalyptic number.

1306454642 is a deficient number, since it is larger than the sum of its proper divisors (653227324).

1306454642 is an equidigital number, since it uses as much as digits as its factorization.

1306454642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653227323.

The product of its (nonzero) digits is 69120, while the sum is 35.

The square root of 1306454642 is about 36144.9117027556. The cubic root of 1306454642 is about 1093.1961967555.

The spelling of 1306454642 in words is "one billion, three hundred six million, four hundred fifty-four thousand, six hundred forty-two".