65021290 has 8 divisors (see below), whose sum is σ = 117038340. Its totient is φ = 26008512.

The previous prime is 65021279. The next prime is 65021293. The reversal of 65021290 is 9212056.

It can be written as a sum of positive squares in 2 ways, for example, as 64657681 + 363609 = 8041^2 + 603^2 .

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

It is not an unprimeable number, because it can be changed into a prime (65021293) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3251055 + ... + 3251074.

Almost surely, 2^65021290 is an apocalyptic number.

65021290 is a deficient number, since it is larger than the sum of its proper divisors (52017050).

65021290 is a wasteful number, since it uses less digits than its factorization.

65021290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6502136.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 65021290 is about 8063.5779899496. The cubic root of 65021290 is about 402.1164691446.

The spelling of 65021290 in words is "sixty-five million, twenty-one thousand, two hundred ninety".