135020237401 has 15 divisors (see below), whose sum is σ = 157535245301. Its totient is φ = 115716199116.

The previous prime is 135020237393. The next prime is 135020237411. The reversal of 135020237401 is 104732020531.

The square root of 135020237401 is 367451.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 135020237401 - 2³ = 135020237393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 135020237401.

It is not an unprimeable number, because it can be changed into a prime (135020237411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 18001350 + ... + 18008848.

Almost surely, 2^135020237401 is an apocalyptic number.

135020237401 is the 367451-st square number.

135020237401 is the 183726-th centered octagonal number.

It is an amenable number.

135020237401 is a deficient number, since it is larger than the sum of its proper divisors (22515007900).

135020237401 is an frugal number, since it uses more digits than its factorization.

135020237401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15026 (or 7506 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

Adding to 135020237401 its reverse (104732020531), we get a palindrome (239752257932).

The spelling of 135020237401 in words is "one hundred thirty-five billion, twenty million, two hundred thirty-seven thousand, four hundred one".