1216642 has 24 divisors (see below), whose sum is σ = 2180736. Its totient is φ = 498456.

The previous prime is 1216619. The next prime is 1216681. The reversal of 1216642 is 2466121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25863 + ... + 25909.

It is an arithmetic number, because the mean of its divisors is an integer number (90864).

2^1216642 is an apocalyptic number.

1216642 is a deficient number, since it is larger than the sum of its proper divisors (964094).

1216642 is an equidigital number, since it uses as much as digits as its factorization.

1216642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142 (or 99 counting only the distinct ones).

The product of its digits is 576, while the sum is 22.

The square root of 1216642 is about 1103.0149591007. The cubic root of 1216642 is about 106.7548467873.

The spelling of 1216642 in words is "one million, two hundred sixteen thousand, six hundred forty-two".