6251381 has 4 divisors (see below), whose sum is σ = 6257472. Its totient is φ = 6245292.

The previous prime is 6251369. The next prime is 6251387. The reversal of 6251381 is 1831526.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1831526 = 2 ⋅915763.

It is a cyclic number.

It is not a de Polignac number, because 6251381 - 2¹⁰ = 6250357 is a prime.

It is a super-2 number, since 2×6251381² = 78159528814322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6251381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6251387) 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, 1085 + ... + 3698.

It is an arithmetic number, because the mean of its divisors is an integer number (1564368).

Almost surely, 2^6251381 is an apocalyptic number.

It is an amenable number.

6251381 is a deficient number, since it is larger than the sum of its proper divisors (6091).

6251381 is a wasteful number, since it uses less digits than its factorization.

6251381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6090.

The product of its digits is 1440, while the sum is 26.

The square root of 6251381 is about 2500.2761847444. The cubic root of 6251381 is about 184.2151409929.

The spelling of 6251381 in words is "six million, two hundred fifty-one thousand, three hundred eighty-one".