10215420 has 48 divisors (see below), whose sum is σ = 28939680. Its totient is φ = 2692096.

The previous prime is 10215389. The next prime is 10215421. The reversal of 10215420 is 2451201.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 10215420.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10215421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4384 + ... + 6296.

It is an arithmetic number, because the mean of its divisors is an integer number (602910).

Almost surely, 2^10215420 is an apocalyptic number.

10215420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 10215420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14469840).

10215420 is an abundant number, since it is smaller than the sum of its proper divisors (18724260).

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

10215420 is a wasteful number, since it uses less digits than its factorization.

10215420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2014 (or 2012 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 10215420 is about 3196.1570674796. The cubic root of 10215420 is about 216.9795191158.

Adding to 10215420 its reverse (2451201), we get a palindrome (12666621).

It can be divided in two parts, 1021 and 5420, that added together give a triangular number (6441 = T₁₁₃).

The spelling of 10215420 in words is "ten million, two hundred fifteen thousand, four hundred twenty".