68262021 has 40 divisors (see below), whose sum is σ = 109379160. Its totient is φ = 42273792.

The previous prime is 68261981. The next prime is 68262037. The reversal of 68262021 is 12026286.

It can be written as a sum of positive squares in 4 ways, for example, as 1185921 + 67076100 = 1089^2 + 8190^2 .

It is not a de Polignac number, because 68262021 - 2¹¹ = 68259973 is a prime.

It is a super-2 number, since 2×68262021² = 9319407022008882, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68262071) 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, 122275 + ... + 122831.

It is an arithmetic number, because the mean of its divisors is an integer number (2734479).

Almost surely, 2^68262021 is an apocalyptic number.

It is an amenable number.

68262021 is a deficient number, since it is larger than the sum of its proper divisors (41117139).

68262021 is a wasteful number, since it uses less digits than its factorization.

68262021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 675 (or 666 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 68262021 is about 8262.0833329131. The cubic root of 68262021 is about 408.6890928522.

The spelling of 68262021 in words is "sixty-eight million, two hundred sixty-two thousand, twenty-one".