169138542 has 64 divisors (see below), whose sum is σ = 373248000. Its totient is φ = 50864640.

The previous prime is 169138531. The next prime is 169138553. The reversal of 169138542 is 245831961.

169138542 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (169138531) and next prime (169138553).

It is a self number, because there is not a number n which added to its sum of digits gives 169138542.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 470959 + ... + 471317.

It is an arithmetic number, because the mean of its divisors is an integer number (5832000).

Almost surely, 2^169138542 is an apocalyptic number.

169138542 is an abundant number, since it is smaller than the sum of its proper divisors (204109458).

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

169138542 is a wasteful number, since it uses less digits than its factorization.

169138542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561.

The product of its digits is 51840, while the sum is 39.

The square root of 169138542 is about 13005.3274468581. The cubic root of 169138542 is about 553.0285185096.

The spelling of 169138542 in words is "one hundred sixty-nine million, one hundred thirty-eight thousand, five hundred forty-two".