71654121 has 36 divisors (see below), whose sum is σ = 131352624. Its totient is φ = 37220400.

The previous prime is 71654081. The next prime is 71654153. The reversal of 71654121 is 12145617.

It is a happy number.

71654121 is a `hidden beast` number, since 7 + 1 + 654 + 1 + 2 + 1 = 666.

It is not a de Polignac number, because 71654121 - 2⁶ = 71654057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71654161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2535 + ... + 12236.

It is an arithmetic number, because the mean of its divisors is an integer number (3648684).

Almost surely, 2^71654121 is an apocalyptic number.

It is an amenable number.

71654121 is a deficient number, since it is larger than the sum of its proper divisors (59698503).

71654121 is a wasteful number, since it uses less digits than its factorization.

71654121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14802 (or 14792 counting only the distinct ones).

The product of its digits is 1680, while the sum is 27.

The square root of 71654121 is about 8464.8757226554. The cubic root of 71654121 is about 415.3495308528.

Adding to 71654121 its reverse (12145617), we get a palindrome (83799738).

The spelling of 71654121 in words is "seventy-one million, six hundred fifty-four thousand, one hundred twenty-one".