6249421 has 4 divisors (see below), whose sum is σ = 6617052. Its totient is φ = 5881792.

The previous prime is 6249409. The next prime is 6249433. The reversal of 6249421 is 1249426.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (6249409) and next prime (6249433).

It can be written as a sum of positive squares in 2 ways, for example, as 2368521 + 3880900 = 1539^2 + 1970^2 .

It is a cyclic number.

It is not a de Polignac number, because 6249421 - 2¹³ = 6241229 is a prime.

It is a Duffinian number.

6249421 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 6249421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6249521) 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, 183790 + ... + 183823.

It is an arithmetic number, because the mean of its divisors is an integer number (1654263).

Almost surely, 2^6249421 is an apocalyptic number.

It is an amenable number.

6249421 is a deficient number, since it is larger than the sum of its proper divisors (367631).

6249421 is a wasteful number, since it uses less digits than its factorization.

6249421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367630.

The product of its digits is 3456, while the sum is 28.

The square root of 6249421 is about 2499.8841973179. The cubic root of 6249421 is about 184.1958866117.

It can be divided in two parts, 6249 and 421, that added together give a triangular number (6670 = T₁₁₅).

The spelling of 6249421 in words is "six million, two hundred forty-nine thousand, four hundred twenty-one".