6461381 has 4 divisors (see below), whose sum is σ = 6469152. Its totient is φ = 6453612.

The previous prime is 6461369. The next prime is 6461383. The reversal of 6461381 is 1831646.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6461381 - 2⁶ = 6461317 is a prime.

It is a super-2 number, since 2×6461381² = 83498888854322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6461383) 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, 2465 + ... + 4358.

It is an arithmetic number, because the mean of its divisors is an integer number (1617288).

Almost surely, 2^6461381 is an apocalyptic number.

It is an amenable number.

6461381 is a deficient number, since it is larger than the sum of its proper divisors (7771).

6461381 is an equidigital number, since it uses as much as digits as its factorization.

6461381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7770.

The product of its digits is 3456, while the sum is 29.

The square root of 6461381 is about 2541.9246645013. The cubic root of 6461381 is about 186.2552186878.

The spelling of 6461381 in words is "six million, four hundred sixty-one thousand, three hundred eighty-one".