47043421 has 4 divisors (see below), whose sum is σ = 47069692. Its totient is φ = 47017152.

The previous prime is 47043407. The next prime is 47043427. The reversal of 47043421 is 12434074.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12434074 = 2 ⋅6217037.

It can be written as a sum of positive squares in 2 ways, for example, as 42758521 + 4284900 = 6539^2 + 2070^2 .

It is a cyclic number.

It is not a de Polignac number, because 47043421 - 2⁵ = 47043389 is a prime.

It is a super-3 number, since 3×47043421³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47043427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10236 + ... + 14101.

It is an arithmetic number, because the mean of its divisors is an integer number (11767423).

Almost surely, 2^47043421 is an apocalyptic number.

It is an amenable number.

47043421 is a deficient number, since it is larger than the sum of its proper divisors (26271).

47043421 is a wasteful number, since it uses less digits than its factorization.

47043421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26270.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 47043421 is about 6858.8206712233. The cubic root of 47043421 is about 360.9937077348.

Adding to 47043421 its reverse (12434074), we get a palindrome (59477495).

The spelling of 47043421 in words is "forty-seven million, forty-three thousand, four hundred twenty-one".