63426 has 24 divisors (see below), whose sum is σ = 142992. Its totient is φ = 18600.

The previous prime is 63421. The next prime is 63439. The reversal of 63426 is 62436.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 63426.

It is not an unprimeable number, because it can be changed into a prime (63421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2031 + ... + 2061.

It is an arithmetic number, because the mean of its divisors is an integer number (5958).

2⁶³⁴²⁶ is an apocalyptic number.

63426 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 63426, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71496).

63426 is an abundant number, since it is smaller than the sum of its proper divisors (79566).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63426 is a wasteful number, since it uses less digits than its factorization.

With its successor (63427) it forms a Ruth-Aaron pair, since the sum of their prime factors is the same (78).

63426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78 (or 47 counting only the distinct ones).

The product of its digits is 864, while the sum is 21.

The square root of 63426 is about 251.8451905437. The cubic root of 63426 is about 39.8800573703.

Subtracting from 63426 its reverse (62436), we obtain a triangular number (990 = T₄₄).

The spelling of 63426 in words is "sixty-three thousand, four hundred twenty-six".