1216536 has 32 divisors (see below), whose sum is σ = 3069360. Its totient is φ = 401792.

The previous prime is 1216529. The next prime is 1216543. The reversal of 1216536 is 6356121.

It is an interprime number because it is at equal distance from previous prime (1216529) and next prime (1216543).

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 4006 + ... + 4298.

2^1216536 is an apocalyptic number.

It is an amenable number.

1216536 is an abundant number, since it is smaller than the sum of its proper divisors (1852824).

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

1216536 is a wasteful number, since it uses less digits than its factorization.

1216536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475 (or 471 counting only the distinct ones).

The product of its digits is 1080, while the sum is 24.

The square root of 1216536 is about 1102.9669079351. The cubic root of 1216536 is about 106.7517463566.

The spelling of 1216536 in words is "one million, two hundred sixteen thousand, five hundred thirty-six".