136075421 has 2 divisors, whose sum is σ = 136075422. Its totient is φ = 136075420.

The previous prime is 136075403. The next prime is 136075447. The reversal of 136075421 is 124570631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77246521 + 58828900 = 8789^2 + 7670^2 .

It is a cyclic number.

It is not a de Polignac number, because 136075421 - 2¹⁰ = 136074397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136075451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68037710 + 68037711.

It is an arithmetic number, because the mean of its divisors is an integer number (68037711).

Almost surely, 2^136075421 is an apocalyptic number.

It is an amenable number.

136075421 is a deficient number, since it is larger than the sum of its proper divisors (1).

136075421 is an equidigital number, since it uses as much as digits as its factorization.

136075421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 136075421 is about 11665.1369901943. The cubic root of 136075421 is about 514.3513636175.

The spelling of 136075421 in words is "one hundred thirty-six million, seventy-five thousand, four hundred twenty-one".