642472245 has 48 divisors (see below), whose sum is σ = 1206608832. Its totient is φ = 314979840.

The previous prime is 642472223. The next prime is 642472247. The reversal of 642472245 is 542274246.

642472245 is a `hidden beast` number, since 6 + 424 + 7 + 224 + 5 = 666.

642472245 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 642472245 - 2¹¹ = 642470197 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642472247) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23130 + ... + 42660.

It is an arithmetic number, because the mean of its divisors is an integer number (25137684).

Almost surely, 2^642472245 is an apocalyptic number.

It is an amenable number.

642472245 is a deficient number, since it is larger than the sum of its proper divisors (564136587).

642472245 is a wasteful number, since it uses less digits than its factorization.

642472245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19602 (or 19599 counting only the distinct ones).

The product of its digits is 107520, while the sum is 36.

The square root of 642472245 is about 25347.0362172779. The cubic root of 642472245 is about 862.8820940944.

The spelling of 642472245 in words is "six hundred forty-two million, four hundred seventy-two thousand, two hundred forty-five".