121478727 has 8 divisors (see below), whose sum is σ = 162453616. Its totient is φ = 80744832.

The previous prime is 121478713. The next prime is 121478737. The reversal of 121478727 is 727874121.

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

It is not a de Polignac number, because 121478727 - 2⁸ = 121478471 is a prime.

It is a super-2 number, since 2×121478727² = 29514162227081058, which contains 22 as substring.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121478737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59068 + ... + 61089.

It is an arithmetic number, because the mean of its divisors is an integer number (20306702).

Almost surely, 2^121478727 is an apocalyptic number.

121478727 is a deficient number, since it is larger than the sum of its proper divisors (40974889).

121478727 is a wasteful number, since it uses less digits than its factorization.

121478727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120497.

The product of its digits is 43904, while the sum is 39.

The square root of 121478727 is about 11021.7388374067. The cubic root of 121478727 is about 495.2601795160.

The spelling of 121478727 in words is "one hundred twenty-one million, four hundred seventy-eight thousand, seven hundred twenty-seven".