1540216 has 16 divisors (see below), whose sum is σ = 3040200. Its totient is φ = 729504.

The previous prime is 1540211. The next prime is 1540223. The reversal of 1540216 is 6120451.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1540193 and 1540202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1540211) 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, 4915 + ... + 5218.

2^1540216 is an apocalyptic number.

It is an amenable number.

1540216 is a deficient number, since it is larger than the sum of its proper divisors (1499984).

1540216 is a wasteful number, since it uses less digits than its factorization.

1540216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10158 (or 10154 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1540216 is about 1241.0543904278. The cubic root of 1540216 is about 115.4854338433.

Adding to 1540216 its reverse (6120451), we get a palindrome (7660667).

The spelling of 1540216 in words is "one million, five hundred forty thousand, two hundred sixteen".