642272742 has 12 divisors (see below), whose sum is σ = 1391590980. Its totient is φ = 214090908.

The previous prime is 642272737. The next prime is 642272747. The reversal of 642272742 is 247272246.

642272742 is a `hidden beast` number, since 642 + 2 + 7 + 2 + 7 + 4 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (642272737) and next prime (642272747).

It is a junction number, because it is equal to n+sod(n) for n = 642272697 and 642272706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642272747) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17840892 + ... + 17840927.

It is an arithmetic number, because the mean of its divisors is an integer number (115965915).

Almost surely, 2^642272742 is an apocalyptic number.

642272742 is an abundant number, since it is smaller than the sum of its proper divisors (749318238).

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

642272742 is a wasteful number, since it uses less digits than its factorization.

642272742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35681827 (or 35681824 counting only the distinct ones).

The product of its digits is 75264, while the sum is 36.

The square root of 642272742 is about 25343.1004811961. The cubic root of 642272742 is about 862.7927696712.

The spelling of 642272742 in words is "six hundred forty-two million, two hundred seventy-two thousand, seven hundred forty-two".