1212870 has 16 divisors (see below), whose sum is σ = 2910960. Its totient is φ = 323424.

The previous prime is 1212857. The next prime is 1212877. The reversal of 1212870 is 782121.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212877) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20185 + ... + 20244.

It is an arithmetic number, because the mean of its divisors is an integer number (181935).

2^1212870 is an apocalyptic number.

1212870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1212870 is an abundant number, since it is smaller than the sum of its proper divisors (1698090).

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

1212870 is a wasteful number, since it uses less digits than its factorization.

1212870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40439.

The product of its (nonzero) digits is 224, while the sum is 21.

The square root of 1212870 is about 1101.3037728075. The cubic root of 1212870 is about 106.6444072475.

Adding to 1212870 its reverse (782121), we get a palindrome (1994991).

The spelling of 1212870 in words is "one million, two hundred twelve thousand, eight hundred seventy".