65261251 has 8 divisors (see below), whose sum is σ = 71900208. Its totient is φ = 58740000.

The previous prime is 65261237. The next prime is 65261263. The reversal of 65261251 is 15216256.

65261251 is nontrivially palindromic in base 9.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 65261251 - 2¹⁹ = 64736963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65261291) 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, 28260 + ... + 30481.

It is an arithmetic number, because the mean of its divisors is an integer number (8987526).

Almost surely, 2^65261251 is an apocalyptic number.

65261251 is a deficient number, since it is larger than the sum of its proper divisors (6638957).

65261251 is a wasteful number, since it uses less digits than its factorization.

65261251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58853.

The product of its digits is 3600, while the sum is 28.

The square root of 65261251 is about 8078.4436001002. The cubic root of 65261251 is about 402.6105319933.

It can be divided in two parts, 6526 and 1251, that added together give a palindrome (7777).

The spelling of 65261251 in words is "sixty-five million, two hundred sixty-one thousand, two hundred fifty-one".