1212090 has 32 divisors (see below), whose sum is σ = 3174336. Its totient is φ = 293760.

The previous prime is 1212061. The next prime is 1212103. The reversal of 1212090 is 902121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1507 + ... + 2166.

It is an arithmetic number, because the mean of its divisors is an integer number (99198).

2^1212090 is an apocalyptic number.

1212090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1212090 is an abundant number, since it is smaller than the sum of its proper divisors (1962246).

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

1212090 is a wasteful number, since it uses less digits than its factorization.

1212090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3694.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1212090 is about 1100.9495901266. The cubic root of 1212090 is about 106.6215412422.

It can be divided in two parts, 121 and 2090, that added together give a triangular number (2211 = T₆₆).

The spelling of 1212090 in words is "one million, two hundred twelve thousand, ninety".