65425144 has 8 divisors (see below), whose sum is σ = 122672160. Its totient is φ = 32712568.

The previous prime is 65425127. The next prime is 65425147. The reversal of 65425144 is 44152456.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65425147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4089064 + ... + 4089079.

It is an arithmetic number, because the mean of its divisors is an integer number (15334020).

Almost surely, 2^65425144 is an apocalyptic number.

It is an amenable number.

65425144 is a deficient number, since it is larger than the sum of its proper divisors (57247016).

65425144 is a wasteful number, since it uses less digits than its factorization.

65425144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8178149 (or 8178145 counting only the distinct ones).

The product of its digits is 19200, while the sum is 31.

The square root of 65425144 is about 8088.5810869398. The cubic root of 65425144 is about 402.9472805077.

The spelling of 65425144 in words is "sixty-five million, four hundred twenty-five thousand, one hundred forty-four".