72127429 has 8 divisors (see below), whose sum is σ = 78809472. Its totient is φ = 65466240.

The previous prime is 72127427. The next prime is 72127457. The reversal of 72127429 is 92472127.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 72127429 - 2¹ = 72127427 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72127394 and 72127403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72127423) 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, 2532 + ... + 12274.

It is an arithmetic number, because the mean of its divisors is an integer number (9851184).

Almost surely, 2^72127429 is an apocalyptic number.

It is an amenable number.

72127429 is a deficient number, since it is larger than the sum of its proper divisors (6682043).

72127429 is a wasteful number, since it uses less digits than its factorization.

72127429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10427.

The product of its digits is 14112, while the sum is 34.

The square root of 72127429 is about 8492.7868806417. The cubic root of 72127429 is about 416.2620486672.

It can be divided in two parts, 7212 and 7429, that added together give a palindrome (14641).

The spelling of 72127429 in words is "seventy-two million, one hundred twenty-seven thousand, four hundred twenty-nine".