1211404086 has 56 divisors (see below), whose sum is σ = 2765298744. Its totient is φ = 397742400.

The previous prime is 1211404079. The next prime is 1211404133. The reversal of 1211404086 is 6804041121.

It is a happy number.

1211404086 is a `hidden beast` number, since 1 + 211 + 40 + 408 + 6 = 666.

It is a super-3 number, since 3×1211404086³ (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 91486 + ... + 103886.

Almost surely, 2^1211404086 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1211404086, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1382649372).

1211404086 is an abundant number, since it is smaller than the sum of its proper divisors (1553894658).

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

1211404086 is an equidigital number, since it uses as much as digits as its factorization.

1211404086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12488 (or 12473 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 1211404086 is about 34805.2307275789. The cubic root of 1211404086 is about 1066.0142529719.

The spelling of 1211404086 in words is "one billion, two hundred eleven million, four hundred four thousand, eighty-six".