1206891420 has 192 divisors, whose sum is σ = 4073158656. Its totient is φ = 261043200.

The previous prime is 1206891403. The next prime is 1206891437. The reversal of 1206891420 is 241986021.

It is an interprime number because it is at equal distance from previous prime (1206891403) and next prime (1206891437).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 975042 + ... + 976278.

It is an arithmetic number, because the mean of its divisors is an integer number (21214368).

Almost surely, 2^1206891420 is an apocalyptic number.

1206891420 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 1206891420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2036579328).

1206891420 is an abundant number, since it is smaller than the sum of its proper divisors (2866267236).

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

1206891420 is a wasteful number, since it uses less digits than its factorization.

1206891420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1380 (or 1378 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 1206891420 is about 34740.3428307782. The cubic root of 1206891420 is about 1064.6889170554.

The spelling of 1206891420 in words is "one billion, two hundred six million, eight hundred ninety-one thousand, four hundred twenty".