6215420 has 12 divisors (see below), whose sum is σ = 13052424. Its totient is φ = 2486160.

The previous prime is 6215401. The next prime is 6215423. The reversal of 6215420 is 245126.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 310771 = 6215420 / (6 + 2 + 1 + 5 + 4 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 6215392 and 6215401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6215423) 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, 155366 + ... + 155405.

It is an arithmetic number, because the mean of its divisors is an integer number (1087702).

Almost surely, 2^6215420 is an apocalyptic number.

It is an amenable number.

6215420 is an abundant number, since it is smaller than the sum of its proper divisors (6837004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6215420 is a wasteful number, since it uses less digits than its factorization.

6215420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310780 (or 310778 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 6215420 is about 2493.0744072330. The cubic root of 6215420 is about 183.8612296461.

The spelling of 6215420 in words is "six million, two hundred fifteen thousand, four hundred twenty".