6438451 has 4 divisors (see below), whose sum is σ = 6474600. Its totient is φ = 6402304.

The previous prime is 6438437. The next prime is 6438457. The reversal of 6438451 is 1548346.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1548346 = 2 ⋅774173.

It is a cyclic number.

It is not a de Polignac number, because 6438451 - 2¹⁹ = 5914163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6438457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17806 + ... + 18163.

It is an arithmetic number, because the mean of its divisors is an integer number (1618650).

Almost surely, 2^6438451 is an apocalyptic number.

6438451 is a deficient number, since it is larger than the sum of its proper divisors (36149).

6438451 is a wasteful number, since it uses less digits than its factorization.

6438451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36148.

The product of its digits is 11520, while the sum is 31.

The square root of 6438451 is about 2537.4102939809. The cubic root of 6438451 is about 186.0346314673.

It can be divided in two parts, 6438 and 451, that added together give a square (6889 = 83²).

The spelling of 6438451 in words is "six million, four hundred thirty-eight thousand, four hundred fifty-one".