1220442 has 16 divisors (see below), whose sum is σ = 2464992. Its totient is φ = 402800.

The previous prime is 1220437. The next prime is 1220489. The reversal of 1220442 is 2440221.

It is an Ulam 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, 309 + ... + 1592.

It is an arithmetic number, because the mean of its divisors is an integer number (154062).

2^1220442 is an apocalyptic number.

1220442 is an abundant number, since it is smaller than the sum of its proper divisors (1244550).

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

1220442 is a wasteful number, since it uses less digits than its factorization.

1220442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2013.

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 1220442 is about 1104.7361675984. The cubic root of 1220442 is about 106.8658755590.

Adding to 1220442 its reverse (2440221), we get a palindrome (3660663).

It can be divided in two parts, 12204 and 42, that added together give a triangular number (12246 = T₁₅₆).

The spelling of 1220442 in words is "one million, two hundred twenty thousand, four hundred forty-two".