13021402 has 4 divisors (see below), whose sum is σ = 19532106. Its totient is φ = 6510700.

The previous prime is 13021399. The next prime is 13021429. The reversal of 13021402 is 20412031.

13021402 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, and also an emirpimes, since its reverse is a distinct semiprime: 20412031 = 839 ⋅24329.

It can be written as a sum of positive squares in only one way, i.e., 12752041 + 269361 = 3571^2 + 519^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3255349 + ... + 3255352.

Almost surely, 2^13021402 is an apocalyptic number.

13021402 is a deficient number, since it is larger than the sum of its proper divisors (6510704).

13021402 is an equidigital number, since it uses as much as digits as its factorization.

13021402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6510703.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 13021402 is about 3608.5179783396. The cubic root of 13021402 is about 235.2624320397.

Adding to 13021402 its reverse (20412031), we get a palindrome (33433433).

It can be divided in two parts, 1302 and 1402, that added together give a square (2704 = 52²).

The spelling of 13021402 in words is "thirteen million, twenty-one thousand, four hundred two".