1206720342 has 40 divisors (see below), whose sum is σ = 2711610000. Its totient is φ = 401100336.

The previous prime is 1206720329. The next prime is 1206720371. The reversal of 1206720342 is 2430276021.

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 19 ways as a sum of consecutive naturals, for example, 47784 + ... + 68532.

It is an arithmetic number, because the mean of its divisors is an integer number (67790250).

Almost surely, 2^1206720342 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1206720342, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1355805000).

1206720342 is an abundant number, since it is smaller than the sum of its proper divisors (1504889658).

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

1206720342 is a wasteful number, since it uses less digits than its factorization.

1206720342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21122 (or 21113 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 1206720342 is about 34737.8805052928. The cubic root of 1206720342 is about 1064.6386077913.

Adding to 1206720342 its reverse (2430276021), we get a palindrome (3636996363).

The spelling of 1206720342 in words is "one billion, two hundred six million, seven hundred twenty thousand, three hundred forty-two".