1242636 has 12 divisors (see below), whose sum is σ = 2899512. Its totient is φ = 414208.

The previous prime is 1242629. The next prime is 1242641. The reversal of 1242636 is 6362421.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51765 + ... + 51788.

It is an arithmetic number, because the mean of its divisors is an integer number (241626).

2^1242636 is an apocalyptic number.

It is an amenable number.

1242636 is an abundant number, since it is smaller than the sum of its proper divisors (1656876).

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

1242636 is a wasteful number, since it uses less digits than its factorization.

1242636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103560 (or 103558 counting only the distinct ones).

The product of its digits is 1728, while the sum is 24.

The square root of 1242636 is about 1114.7358431485. The cubic root of 1242636 is about 107.5097809741.

The spelling of 1242636 in words is "one million, two hundred forty-two thousand, six hundred thirty-six".