49121421 has 16 divisors (see below), whose sum is σ = 67092480. Its totient is φ = 31958640.

The previous prime is 49121411. The next prime is 49121467. The reversal of 49121421 is 12412194.

49121421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 49121421 - 2¹⁰ = 49120397 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 49121391 and 49121400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49121411) 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 15 ways as a sum of consecutive naturals, for example, 20820 + ... + 23058.

It is an arithmetic number, because the mean of its divisors is an integer number (4193280).

Almost surely, 2^49121421 is an apocalyptic number.

It is an amenable number.

49121421 is a deficient number, since it is larger than the sum of its proper divisors (17971059).

49121421 is a wasteful number, since it uses less digits than its factorization.

49121421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2416.

The product of its digits is 576, while the sum is 24.

The square root of 49121421 is about 7008.6675623830. The cubic root of 49121421 is about 366.2325778462.

It can be divided in two parts, 491 and 21421, that added together give a palindrome (21912).

The spelling of 49121421 in words is "forty-nine million, one hundred twenty-one thousand, four hundred twenty-one".