1206821862 has 32 divisors (see below), whose sum is σ = 2683209600. Its totient is φ = 402066504.

The previous prime is 1206821827. The next prime is 1206821897. The reversal of 1206821862 is 2681286021.

It is an interprime number because it is at equal distance from previous prime (1206821827) and next prime (1206821897).

It is a super-2 number, since 2×1206821862² = 2912838013202294088, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128689 + ... + 137747.

It is an arithmetic number, because the mean of its divisors is an integer number (83850300).

Almost surely, 2^1206821862 is an apocalyptic number.

1206821862 is an abundant number, since it is smaller than the sum of its proper divisors (1476387738).

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

1206821862 is a wasteful number, since it uses less digits than its factorization.

1206821862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11537 (or 11531 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 1206821862 is about 34739.3417036075. The cubic root of 1206821862 is about 1064.6684625630.

It can be divided in two parts, 12068 and 21862, that added together give a triangular number (33930 = T₂₆₀).

The spelling of 1206821862 in words is "one billion, two hundred six million, eight hundred twenty-one thousand, eight hundred sixty-two".