53401421 has 2 divisors, whose sum is σ = 53401422. Its totient is φ = 53401420.

The previous prime is 53401409. The next prime is 53401433. The reversal of 53401421 is 12410435.

It is a balanced prime because it is at equal distance from previous prime (53401409) and next prime (53401433).

It can be written as a sum of positive squares in only one way, i.e., 37039396 + 16362025 = 6086^2 + 4045^2 .

It is a cyclic number.

It is not a de Polignac number, because 53401421 - 2¹⁴ = 53385037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 53401393 and 53401402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53401321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26700710 + 26700711.

It is an arithmetic number, because the mean of its divisors is an integer number (26700711).

Almost surely, 2^53401421 is an apocalyptic number.

It is an amenable number.

53401421 is a deficient number, since it is larger than the sum of its proper divisors (1).

53401421 is an equidigital number, since it uses as much as digits as its factorization.

53401421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 53401421 is about 7307.6275904017. The cubic root of 53401421 is about 376.5745258041.

Adding to 53401421 its reverse (12410435), we get a palindrome (65811856).

The spelling of 53401421 in words is "fifty-three million, four hundred one thousand, four hundred twenty-one".