642341212 has 12 divisors (see below), whose sum is σ = 1124277336. Its totient is φ = 321119120.

The previous prime is 642341207. The next prime is 642341239. The reversal of 642341212 is 212143246.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34887 + ... + 50017.

It is an arithmetic number, because the mean of its divisors is an integer number (93689778).

Almost surely, 2^642341212 is an apocalyptic number.

It is an amenable number.

642341212 is a deficient number, since it is larger than the sum of its proper divisors (481936124).

642341212 is a wasteful number, since it uses less digits than its factorization.

642341212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25748 (or 25746 counting only the distinct ones).

The product of its digits is 2304, while the sum is 25.

The square root of 642341212 is about 25344.4513059565. The cubic root of 642341212 is about 862.8234281532.

Adding to 642341212 its reverse (212143246), we get a palindrome (854484458).

The spelling of 642341212 in words is "six hundred forty-two million, three hundred forty-one thousand, two hundred twelve".