642948054 has 32 divisors (see below), whose sum is σ = 1483088640. Its totient is φ = 182012832.

The previous prime is 642948037. The next prime is 642948071. The reversal of 642948054 is 450849246.

It is an interprime number because it is at equal distance from previous prime (642948037) and next prime (642948071).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 642947997 and 642948015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65644 + ... + 74799.

It is an arithmetic number, because the mean of its divisors is an integer number (46346520).

Almost surely, 2^642948054 is an apocalyptic number.

642948054 is an abundant number, since it is smaller than the sum of its proper divisors (840140586).

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

642948054 is a wasteful number, since it uses less digits than its factorization.

642948054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140564.

The product of its (nonzero) digits is 276480, while the sum is 42.

The square root of 642948054 is about 25356.4203703914. The cubic root of 642948054 is about 863.0950556956.

The spelling of 642948054 in words is "six hundred forty-two million, nine hundred forty-eight thousand, fifty-four".