642126174 has 32 divisors (see below), whose sum is σ = 1318464000. Its totient is φ = 208363200.

The previous prime is 642126169. The next prime is 642126179. The reversal of 642126174 is 471621246.

It is an interprime number because it is at equal distance from previous prime (642126169) and next prime (642126179).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642126179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120139 + ... + 125369.

It is an arithmetic number, because the mean of its divisors is an integer number (41202000).

Almost surely, 2^642126174 is an apocalyptic number.

642126174 is an abundant number, since it is smaller than the sum of its proper divisors (676337826).

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

642126174 is a wasteful number, since it uses less digits than its factorization.

642126174 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5776.

The product of its digits is 16128, while the sum is 33.

The square root of 642126174 is about 25340.2086416036. The cubic root of 642126174 is about 862.7271342992.

The spelling of 642126174 in words is "six hundred forty-two million, one hundred twenty-six thousand, one hundred seventy-four".