6440151 has 8 divisors (see below), whose sum is σ = 8600704. Its totient is φ = 4286520.

The previous prime is 6440149. The next prime is 6440171. The reversal of 6440151 is 1510446.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6440151 - 2¹ = 6440149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6440131) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 1110 + ... + 3756.

It is an arithmetic number, because the mean of its divisors is an integer number (1075088).

Almost surely, 2^6440151 is an apocalyptic number.

6440151 is a deficient number, since it is larger than the sum of its proper divisors (2160553).

6440151 is a wasteful number, since it uses less digits than its factorization.

6440151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3461.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 6440151 is about 2537.7452590833. The cubic root of 6440151 is about 186.0510034716.

Adding to 6440151 its reverse (1510446), we get a palindrome (7950597).

The spelling of 6440151 in words is "six million, four hundred forty thousand, one hundred fifty-one".