67021253 has 4 divisors (see below), whose sum is σ = 72176748. Its totient is φ = 61865760.

The previous prime is 67021247. The next prime is 67021261. The reversal of 67021253 is 35212076.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2748964 + 64272289 = 1658^2 + 8017^2 .

It is a cyclic number.

It is not a de Polignac number, because 67021253 - 2⁴ = 67021237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67021153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2577728 + ... + 2577753.

It is an arithmetic number, because the mean of its divisors is an integer number (18044187).

Almost surely, 2^67021253 is an apocalyptic number.

It is an amenable number.

67021253 is a deficient number, since it is larger than the sum of its proper divisors (5155495).

67021253 is a wasteful number, since it uses less digits than its factorization.

67021253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5155494.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 67021253 is about 8186.6509025364. The cubic root of 67021253 is about 406.1977508188.

The spelling of 67021253 in words is "sixty-seven million, twenty-one thousand, two hundred fifty-three".