54135421 has 2 divisors, whose sum is σ = 54135422. Its totient is φ = 54135420.

The previous prime is 54135379. The next prime is 54135439. The reversal of 54135421 is 12453145.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41139396 + 12996025 = 6414^2 + 3605^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54135421 is a prime.

It is equal to p_3233806 and since 54135421 and 3233806 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54135821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27067710 + 27067711.

It is an arithmetic number, because the mean of its divisors is an integer number (27067711).

Almost surely, 2^54135421 is an apocalyptic number.

It is an amenable number.

54135421 is a deficient number, since it is larger than the sum of its proper divisors (1).

54135421 is an equidigital number, since it uses as much as digits as its factorization.

54135421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2400, while the sum is 25.

The square root of 54135421 is about 7357.6776906847. The cubic root of 54135421 is about 378.2920137469.

Adding to 54135421 its reverse (12453145), we get a palindrome (66588566).

The spelling of 54135421 in words is "fifty-four million, one hundred thirty-five thousand, four hundred twenty-one".