13402042 has 4 divisors (see below), whose sum is σ = 20103066. Its totient is φ = 6701020.

The previous prime is 13402033. The next prime is 13402043. The reversal of 13402042 is 24020431.

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., 13256881 + 145161 = 3641^2 + 381^2 .

It is a super-2 number, since 2×13402042² = 359229459539528, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13402043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3350509 + ... + 3350512.

Almost surely, 2^13402042 is an apocalyptic number.

13402042 is a deficient number, since it is larger than the sum of its proper divisors (6701024).

13402042 is an equidigital number, since it uses as much as digits as its factorization.

13402042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6701023.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 13402042 is about 3660.8799488648. The cubic root of 13402042 is about 237.5328383033.

Adding to 13402042 its reverse (24020431), we get a palindrome (37422473).

It can be divided in two parts, 1 and 3402042, that added together give a palindrome (3402043).

The spelling of 13402042 in words is "thirteen million, four hundred two thousand, forty-two".