1216572 has 36 divisors (see below), whose sum is σ = 3303720. Its totient is φ = 347424.

The previous prime is 1216561. The next prime is 1216577. The reversal of 1216572 is 2756121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216577) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 447 + ... + 1622.

It is an arithmetic number, because the mean of its divisors is an integer number (91770).

2^1216572 is an apocalyptic number.

1216572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1216572 is an abundant number, since it is smaller than the sum of its proper divisors (2087148).

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

1216572 is a wasteful number, since it uses less digits than its factorization.

1216572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2090 (or 2081 counting only the distinct ones).

The product of its digits is 840, while the sum is 24.

The square root of 1216572 is about 1102.9832274337. The cubic root of 1216572 is about 106.7527993533.

The spelling of 1216572 in words is "one million, two hundred sixteen thousand, five hundred seventy-two".