537421 has 8 divisors (see below), whose sum is σ = 576504. Its totient is φ = 499200.

The previous prime is 537413. The next prime is 537497. The reversal of 537421 is 124735.

It can be written as a sum of positive squares in 4 ways, for example, as 114921 + 422500 = 339^2 + 650^2 .

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

It is a 5-Lehmer number, since φ(537421) divides (537421-1)⁵.

It is a cyclic number.

It is not a de Polignac number, because 537421 - 2³ = 537413 is a prime.

537421 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 537392 and 537401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (537401) 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, 1561 + ... + 1873.

It is an arithmetic number, because the mean of its divisors is an integer number (72063).

2⁵³⁷⁴²¹ is an apocalyptic number.

It is an amenable number.

537421 is a deficient number, since it is larger than the sum of its proper divisors (39083).

537421 is a wasteful number, since it uses less digits than its factorization.

537421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431.

The product of its digits is 840, while the sum is 22.

The square root of 537421 is about 733.0900353981. The cubic root of 537421 is about 81.3026829924.

Subtracting from 537421 its reverse (124735), we obtain a triangular number (412686 = T₉₀₈).

The spelling of 537421 in words is "five hundred thirty-seven thousand, four hundred twenty-one".