64531142 has 16 divisors (see below), whose sum is σ = 104489952. Its totient is φ = 29712960.

The previous prime is 64531109. The next prime is 64531151. The reversal of 64531142 is 24113546.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9167 + ... + 14597.

It is an arithmetic number, because the mean of its divisors is an integer number (6530622).

Almost surely, 2^64531142 is an apocalyptic number.

64531142 is a deficient number, since it is larger than the sum of its proper divisors (39958810).

64531142 is a wasteful number, since it uses less digits than its factorization.

64531142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5903.

The product of its digits is 2880, while the sum is 26.

The square root of 64531142 is about 8033.1277843689. The cubic root of 64531142 is about 401.1034987601.

Adding to 64531142 its reverse (24113546), we get a palindrome (88644688).

The spelling of 64531142 in words is "sixty-four million, five hundred thirty-one thousand, one hundred forty-two".