6402542 has 4 divisors (see below), whose sum is σ = 9603816. Its totient is φ = 3201270.

The previous prime is 6402541. The next prime is 6402547. The reversal of 6402542 is 2452046.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6402541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1600634 + ... + 1600637.

It is an arithmetic number, because the mean of its divisors is an integer number (2400954).

Almost surely, 2^6402542 is an apocalyptic number.

6402542 is a deficient number, since it is larger than the sum of its proper divisors (3201274).

6402542 is a wasteful number, since it uses less digits than its factorization.

6402542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3201273.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 6402542 is about 2530.3244851204. The cubic root of 6402542 is about 185.6881311717.

Adding to 6402542 its reverse (2452046), we get a palindrome (8854588).

The spelling of 6402542 in words is "six million, four hundred two thousand, five hundred forty-two".