136402542 has 80 divisors (see below), whose sum is σ = 319347072. Its totient is φ = 43467840.

The previous prime is 136402529. The next prime is 136402547. The reversal of 136402542 is 245204631.

136402542 is a `hidden beast` number, since 13 + 640 + 2 + 5 + 4 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

136402542 is a modest number, since divided by 2542 gives 1364 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136402547) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 788368 + ... + 788540.

Almost surely, 2^136402542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 136402542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159673536).

136402542 is an abundant number, since it is smaller than the sum of its proper divisors (182944530).

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

136402542 is a wasteful number, since it uses less digits than its factorization.

136402542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375 (or 366 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 136402542 is about 11679.1498834461. The cubic root of 136402542 is about 514.7631952432.

The spelling of 136402542 in words is "one hundred thirty-six million, four hundred two thousand, five hundred forty-two".