13021642 has 4 divisors (see below), whose sum is σ = 19532466. Its totient is φ = 6510820.

The previous prime is 13021633. The next prime is 13021663. The reversal of 13021642 is 24612031.

13021642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 9369721 + 3651921 = 3061^2 + 1911^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3255409 + ... + 3255412.

Almost surely, 2^13021642 is an apocalyptic number.

13021642 is a deficient number, since it is larger than the sum of its proper divisors (6510824).

13021642 is an equidigital number, since it uses as much as digits as its factorization.

13021642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6510823.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 13021642 is about 3608.5512328357. The cubic root of 13021642 is about 235.2638774200.

Adding to 13021642 its reverse (24612031), we get a palindrome (37633673).

The spelling of 13021642 in words is "thirteen million, twenty-one thousand, six hundred forty-two".