215460 has 120 divisors (see below), whose sum is σ = 813120. Its totient is φ = 46656.

The previous prime is 215459. The next prime is 215461. The reversal of 215460 is 64512.

215460 = T₉₃ + T₉₄ + ... + T₁₂₇.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (215459) and next prime (215461).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (215461) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 11331 + ... + 11349.

It is an arithmetic number, because the mean of its divisors is an integer number (6776).

2²¹⁵⁴⁶⁰ is an apocalyptic number.

215460 is a gapful number since it is divisible by the number (20) 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 215460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (406560).

215460 is an abundant number, since it is smaller than the sum of its proper divisors (597660).

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

215460 is a wasteful number, since it uses less digits than its factorization.

215460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47 (or 36 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 215460 is about 464.1766904962. The cubic root of 215460 is about 59.9499582754.

Adding to 215460 its reverse (64512), we get a palindrome (279972).

The spelling of 215460 in words is "two hundred fifteen thousand, four hundred sixty".