49272121 has 4 divisors (see below), whose sum is σ = 50320512. Its totient is φ = 48223732.

The previous prime is 49272107. The next prime is 49272127. The reversal of 49272121 is 12127294.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12127294 = 2 ⋅6063647.

It is a cyclic number.

It is not a de Polignac number, because 49272121 - 2⁵ = 49272089 is a prime.

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

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 49272121.

It is not an unprimeable number, because it can be changed into a prime (49272127) 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 3 ways as a sum of consecutive naturals, for example, 524125 + ... + 524218.

It is an arithmetic number, because the mean of its divisors is an integer number (12580128).

Almost surely, 2^49272121 is an apocalyptic number.

It is an amenable number.

49272121 is a deficient number, since it is larger than the sum of its proper divisors (1048391).

49272121 is a wasteful number, since it uses less digits than its factorization.

49272121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1048390.

The product of its digits is 2016, while the sum is 28.

The square root of 49272121 is about 7019.4103028673. The cubic root of 49272121 is about 366.6067181147.

The spelling of 49272121 in words is "forty-nine million, two hundred seventy-two thousand, one hundred twenty-one".