1211960 has 32 divisors (see below), whose sum is σ = 2797200. Its totient is φ = 472320.

The previous prime is 1211933. The next prime is 1211983. The reversal of 1211960 is 691121.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1271 + ... + 2009.

2^1211960 is an apocalyptic number.

1211960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1211960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1398600).

1211960 is an abundant number, since it is smaller than the sum of its proper divisors (1585240).

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

1211960 is a wasteful number, since it uses less digits than its factorization.

1211960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 791 (or 787 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 20.

The square root of 1211960 is about 1100.8905486014. The cubic root of 1211960 is about 106.6177292877.

The spelling of 1211960 in words is "one million, two hundred eleven thousand, nine hundred sixty".