135601401 has 48 divisors (see below), whose sum is σ = 211667904. Its totient is φ = 76717056.

The previous prime is 135601397. The next prime is 135601429. The reversal of 135601401 is 104106531.

It is not a de Polignac number, because 135601401 - 2² = 135601397 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (135601451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 597250 + ... + 597476.

It is an arithmetic number, because the mean of its divisors is an integer number (4409748).

Almost surely, 2^135601401 is an apocalyptic number.

It is an amenable number.

135601401 is a deficient number, since it is larger than the sum of its proper divisors (76066503).

135601401 is a wasteful number, since it uses less digits than its factorization.

135601401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330 (or 313 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 135601401 is about 11644.8014581615. The cubic root of 135601401 is about 513.7534195047.

Adding to 135601401 its reverse (104106531), we get a palindrome (239707932).

The spelling of 135601401 in words is "one hundred thirty-five million, six hundred one thousand, four hundred one".