71154021 has 8 divisors (see below), whose sum is σ = 97932544. Its totient is φ = 45905760.

The previous prime is 71153969. The next prime is 71154043. The reversal of 71154021 is 12045117.

It is a happy number.

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

It is not a de Polignac number, because 71154021 - 2⁷ = 71153893 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 (71153021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 382456 + ... + 382641.

It is an arithmetic number, because the mean of its divisors is an integer number (12241568).

Almost surely, 2^71154021 is an apocalyptic number.

It is an amenable number.

71154021 is a deficient number, since it is larger than the sum of its proper divisors (26778523).

71154021 is a wasteful number, since it uses less digits than its factorization.

71154021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765131.

The product of its (nonzero) digits is 280, while the sum is 21.

The square root of 71154021 is about 8435.2842868513. The cubic root of 71154021 is about 414.3809825807.

Adding to 71154021 its reverse (12045117), we get a palindrome (83199138).

The spelling of 71154021 in words is "seventy-one million, one hundred fifty-four thousand, twenty-one".