135402420 has 48 divisors (see below), whose sum is σ = 391362048. Its totient is φ = 34942080.

The previous prime is 135402419. The next prime is 135402437. The reversal of 135402420 is 24204531.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34539 + ... + 38258.

It is an arithmetic number, because the mean of its divisors is an integer number (8153376).

Almost surely, 2^135402420 is an apocalyptic number.

135402420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

135402420 is an abundant number, since it is smaller than the sum of its proper divisors (255959628).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

135402420 is a wasteful number, since it uses less digits than its factorization.

135402420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72840 (or 72838 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 135402420 is about 11636.2545520455. The cubic root of 135402420 is about 513.5020031924.

Adding to 135402420 its reverse (24204531), we get a palindrome (159606951).

The spelling of 135402420 in words is "one hundred thirty-five million, four hundred two thousand, four hundred twenty".