642754 has 16 divisors (see below), whose sum is σ = 1138176. Its totient is φ = 266400.

The previous prime is 642739. The next prime is 642769. The reversal of 642754 is 457246.

642754 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (642739) and next prime (642769).

It is an unprimeable number.

642754 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 307 + ... + 1174.

It is an arithmetic number, because the mean of its divisors is an integer number (71136).

2⁶⁴²⁷⁵⁴ is an apocalyptic number.

642754 is a deficient number, since it is larger than the sum of its proper divisors (495422).

642754 is a wasteful number, since it uses less digits than its factorization.

642754 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1521.

The product of its digits is 6720, while the sum is 28.

The square root of 642754 is about 801.7194022849. The cubic root of 642754 is about 86.3008214102.

The spelling of 642754 in words is "six hundred forty-two thousand, seven hundred fifty-four".