1210842 has 32 divisors (see below), whose sum is σ = 2851200. Its totient is φ = 379584.

The previous prime is 1210831. The next prime is 1210843. The reversal of 1210842 is 2480121.

It is a super-2 number, since 2×1210842² = 2932276697928, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1210843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 259 + ... + 1577.

It is an arithmetic number, because the mean of its divisors is an integer number (89100).

2^1210842 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1210842, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1425600).

1210842 is an abundant number, since it is smaller than the sum of its proper divisors (1640358).

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

1210842 is a wasteful number, since it uses less digits than its factorization.

1210842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1347 (or 1341 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 1210842 is about 1100.3826607140. The cubic root of 1210842 is about 106.5849352206.

Adding to 1210842 its reverse (2480121), we get a palindrome (3690963).

It can be divided in two parts, 12108 and 42, that multiplied together give a triangular number (508536 = T₁₀₀₈).

The spelling of 1210842 in words is "one million, two hundred ten thousand, eight hundred forty-two".