4140135421 has 2 divisors, whose sum is σ = 4140135422. Its totient is φ = 4140135420.

The previous prime is 4140135413. The next prime is 4140135449. The reversal of 4140135421 is 1245310414.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4107015396 + 33120025 = 64086^2 + 5755^2 .

It is a cyclic number.

It is not a de Polignac number, because 4140135421 - 2³ = 4140135413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4140135481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2070067710 + 2070067711.

It is an arithmetic number, because the mean of its divisors is an integer number (2070067711).

Almost surely, 2^4140135421 is an apocalyptic number.

It is an amenable number.

4140135421 is a deficient number, since it is larger than the sum of its proper divisors (1).

4140135421 is an equidigital number, since it uses as much as digits as its factorization.

4140135421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 4140135421 is about 64343.8840994232. The cubic root of 4140135421 is about 1605.7262812252.

Adding to 4140135421 its reverse (1245310414), we get a palindrome (5385445835).

The spelling of 4140135421 in words is "four billion, one hundred forty million, one hundred thirty-five thousand, four hundred twenty-one".