1261206342 has 32 divisors (see below), whose sum is σ = 3057471360. Its totient is φ = 382183560.

The previous prime is 1261206337. The next prime is 1261206379. The reversal of 1261206342 is 2436021621.

1261206342 is a `hidden beast` number, since 1 + 2 + 6 + 1 + 20 + 634 + 2 = 666.

1261206342 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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 15 ways as a sum of consecutive naturals, for example, 1061028 + ... + 1062215.

It is an arithmetic number, because the mean of its divisors is an integer number (95545980).

Almost surely, 2^1261206342 is an apocalyptic number.

1261206342 is an abundant number, since it is smaller than the sum of its proper divisors (1796265018).

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

1261206342 is a wasteful number, since it uses less digits than its factorization.

1261206342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2123265 (or 2123259 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 1261206342 is about 35513.4670512469. The cubic root of 1261206342 is about 1080.4268837157.

Adding to 1261206342 its reverse (2436021621), we get a palindrome (3697227963).

The spelling of 1261206342 in words is "one billion, two hundred sixty-one million, two hundred six thousand, three hundred forty-two".