16212540 has 24 divisors (see below), whose sum is σ = 45395280. Its totient is φ = 4323328.

The previous prime is 16212523. The next prime is 16212557. The reversal of 16212540 is 4521261.

It is an interprime number because it is at equal distance from previous prime (16212523) and next prime (16212557).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135045 + ... + 135164.

It is an arithmetic number, because the mean of its divisors is an integer number (1891470).

Almost surely, 2^16212540 is an apocalyptic number.

16212540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16212540 is an abundant number, since it is smaller than the sum of its proper divisors (29182740).

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

16212540 is a wasteful number, since it uses less digits than its factorization.

16212540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270221 (or 270219 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 16212540 is about 4026.4798521786. The cubic root of 16212540 is about 253.0950706878.

It can be divided in two parts, 162125 and 40, that added together give a triangular number (162165 = T₅₆₉).

The spelling of 16212540 in words is "sixteen million, two hundred twelve thousand, five hundred forty".