64772142 has 16 divisors (see below), whose sum is σ = 137164752. Its totient is φ = 20320640.

The previous prime is 64772131. The next prime is 64772143. The reversal of 64772142 is 24127746.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64772143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 317409 + ... + 317612.

It is an arithmetic number, because the mean of its divisors is an integer number (8572797).

Almost surely, 2^64772142 is an apocalyptic number.

64772142 is an abundant number, since it is smaller than the sum of its proper divisors (72392610).

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

64772142 is a wasteful number, since it uses less digits than its factorization.

64772142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635043.

The product of its digits is 18816, while the sum is 33.

The square root of 64772142 is about 8048.1141890507. The cubic root of 64772142 is about 401.6022029622.

Adding to 64772142 its reverse (24127746), we get a palindrome (88899888).

The spelling of 64772142 in words is "sixty-four million, seven hundred seventy-two thousand, one hundred forty-two".