135377421 has 4 divisors (see below), whose sum is σ = 180503232. Its totient is φ = 90251612.

The previous prime is 135377393. The next prime is 135377461. The reversal of 135377421 is 124773531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 124773531 = 3 ⋅41591177.

It is a cyclic number.

It is not a de Polignac number, because 135377421 - 2⁶ = 135377357 is a prime.

It is a super-2 number, since 2×135377421² = 36654092233222482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135377461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22562901 + ... + 22562906.

It is an arithmetic number, because the mean of its divisors is an integer number (45125808).

Almost surely, 2^135377421 is an apocalyptic number.

It is an amenable number.

135377421 is a deficient number, since it is larger than the sum of its proper divisors (45125811).

135377421 is an equidigital number, since it uses as much as digits as its factorization.

135377421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45125810.

The product of its digits is 17640, while the sum is 33.

The square root of 135377421 is about 11635.1803166088. The cubic root of 135377421 is about 513.4703990633.

The spelling of 135377421 in words is "one hundred thirty-five million, three hundred seventy-seven thousand, four hundred twenty-one".