6461251 has 4 divisors (see below), whose sum is σ = 6467904. Its totient is φ = 6454600.

The previous prime is 6461249. The next prime is 6461261. The reversal of 6461251 is 1521646.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 6461251 - 2¹ = 6461249 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6461201) 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 3 ways as a sum of consecutive naturals, for example, 1555 + ... + 3916.

It is an arithmetic number, because the mean of its divisors is an integer number (1616976).

Almost surely, 2^6461251 is an apocalyptic number.

6461251 is a deficient number, since it is larger than the sum of its proper divisors (6653).

6461251 is a wasteful number, since it uses less digits than its factorization.

6461251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6652.

The product of its digits is 1440, while the sum is 25.

The square root of 6461251 is about 2541.8990931978. The cubic root of 6461251 is about 186.2539695564.

Adding to 6461251 its reverse (1521646), we get a palindrome (7982897).

The spelling of 6461251 in words is "six million, four hundred sixty-one thousand, two hundred fifty-one".