612240642 has 48 divisors (see below), whose sum is σ = 1431900288. Its totient is φ = 187941600.

The previous prime is 612240641. The next prime is 612240647. The reversal of 612240642 is 246042216.

612240642 is a `hidden beast` number, since 6 + 12 + 2 + 4 + 0 + 642 = 666.

It is not an unprimeable number, because it can be changed into a prime (612240641) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 105517 + ... + 111167.

It is an arithmetic number, because the mean of its divisors is an integer number (29831256).

Almost surely, 2^612240642 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 612240642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (715950144).

612240642 is an abundant number, since it is smaller than the sum of its proper divisors (819659646).

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

612240642 is a wasteful number, since it uses less digits than its factorization.

612240642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6135 (or 6132 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 612240642 is about 24743.4969638489. The cubic root of 612240642 is about 849.1297399816.

Adding to 612240642 its reverse (246042216), we get a palindrome (858282858).

It can be divided in two parts, 6122 and 40642, that added together give a palindrome (46764).

The spelling of 612240642 in words is "six hundred twelve million, two hundred forty thousand, six hundred forty-two".