65122500 has 120 divisors (see below), whose sum is σ = 200310880. Its totient is φ = 16416000.

The previous prime is 65122493. The next prime is 65122507. The reversal of 65122500 is 522156.

It is an interprime number because it is at equal distance from previous prime (65122493) and next prime (65122507).

It is not an unprimeable number, because it can be changed into a prime (65122507) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 142272 + ... + 142728.

Almost surely, 2^65122500 is an apocalyptic number.

65122500 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65122500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100155440).

65122500 is an abundant number, since it is smaller than the sum of its proper divisors (135188380).

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

65122500 is a wasteful number, since it uses less digits than its factorization.

65122500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503 (or 486 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 65122500 is about 8069.8512997452. The cubic root of 65122500 is about 402.3250014043.

Adding to 65122500 its reverse (522156), we get a palindrome (65644656).

The spelling of 65122500 in words is "sixty-five million, one hundred twenty-two thousand, five hundred".