67421545 has 8 divisors (see below), whose sum is σ = 80949960. Its totient is φ = 53907840.

The previous prime is 67421539. The next prime is 67421567. The reversal of 67421545 is 54512476.

It can be written as a sum of positive squares in 4 ways, for example, as 6456681 + 60964864 = 2541^2 + 7808^2 .

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

It is not a de Polignac number, because 67421545 - 2³ = 67421537 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 67421545.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15735 + ... + 19555.

It is an arithmetic number, because the mean of its divisors is an integer number (10118745).

Almost surely, 2^67421545 is an apocalyptic number.

It is an amenable number.

67421545 is a deficient number, since it is larger than the sum of its proper divisors (13528415).

67421545 is a wasteful number, since it uses less digits than its factorization.

67421545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7355.

The product of its digits is 33600, while the sum is 34.

The square root of 67421545 is about 8211.0623551402. The cubic root of 67421545 is about 407.0048334560.

The spelling of 67421545 in words is "sixty-seven million, four hundred twenty-one thousand, five hundred forty-five".