642254193 has 24 divisors (see below), whose sum is σ = 1060899008. Its totient is φ = 366770592.

The previous prime is 642254191. The next prime is 642254209. The reversal of 642254193 is 391452246.

It is a happy number.

642254193 is a `hidden beast` number, since 6 + 4 + 22 + 541 + 93 = 666.

It is not a de Polignac number, because 642254193 - 2¹ = 642254191 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (642254191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 174771 + ... + 178407.

Almost surely, 2^642254193 is an apocalyptic number.

642254193 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

It is an amenable number.

642254193 is a deficient number, since it is larger than the sum of its proper divisors (418644815).

642254193 is a wasteful number, since it uses less digits than its factorization.

642254193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6453 (or 6450 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 642254193 is about 25342.7345209628. The cubic root of 642254193 is about 862.7844636998.

The spelling of 642254193 in words is "six hundred forty-two million, two hundred fifty-four thousand, one hundred ninety-three".