67452561 has 16 divisors (see below), whose sum is σ = 109014720. Its totient is φ = 40880160.

The previous prime is 67452533. The next prime is 67452563. The reversal of 67452561 is 16525476.

It is a happy number.

67452561 is a `hidden beast` number, since 6 + 74 + 525 + 61 = 666.

It is not a de Polignac number, because 67452561 - 2⁵ = 67452529 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (67452563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113260 + ... + 113853.

It is an arithmetic number, because the mean of its divisors is an integer number (6813420).

Almost surely, 2^67452561 is an apocalyptic number.

It is an amenable number.

67452561 is a deficient number, since it is larger than the sum of its proper divisors (41562159).

67452561 is a wasteful number, since it uses less digits than its factorization.

67452561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227133 (or 227127 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 67452561 is about 8212.9508095446. The cubic root of 67452561 is about 407.0672355000.

It can be divided in two parts, 674 and 52561, that added together give a palindrome (53235).

The spelling of 67452561 in words is "sixty-seven million, four hundred fifty-two thousand, five hundred sixty-one".