6421252 has 6 divisors (see below), whose sum is σ = 11237198. Its totient is φ = 3210624.

The previous prime is 6421249. The next prime is 6421271. The reversal of 6421252 is 2521246.

It can be written as a sum of positive squares in only one way, i.e., 5089536 + 1331716 = 2256^2 + 1154^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 802653 + ... + 802660.

Almost surely, 2^6421252 is an apocalyptic number.

It is an amenable number.

6421252 is a deficient number, since it is larger than the sum of its proper divisors (4815946).

6421252 is a wasteful number, since it uses less digits than its factorization.

6421252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1605317 (or 1605315 counting only the distinct ones).

The product of its digits is 960, while the sum is 22.

The square root of 6421252 is about 2534.0189423128. The cubic root of 6421252 is about 185.8688326390.

Adding to 6421252 its reverse (2521246), we get a palindrome (8942498).

It can be divided in two parts, 64 and 21252, that added together give a square (21316 = 146²).

The spelling of 6421252 in words is "six million, four hundred twenty-one thousand, two hundred fifty-two".