139471542 has 72 divisors (see below), whose sum is σ = 362935872. Its totient is φ = 38556000.

The previous prime is 139471531. The next prime is 139471583. The reversal of 139471542 is 245174931.

139471542 is a `hidden beast` number, since 139 + 471 + 54 + 2 = 666.

It is a super-2 number, since 2×139471542² = 38904622055715528, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 139471497 and 139471506.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 24792 + ... + 29892.

It is an arithmetic number, because the mean of its divisors is an integer number (5040776).

Almost surely, 2^139471542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139471542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (181467936).

139471542 is an abundant number, since it is smaller than the sum of its proper divisors (223464330).

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

139471542 is a wasteful number, since it uses less digits than its factorization.

139471542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5154 (or 5144 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 139471542 is about 11809.8070263658. The cubic root of 139471542 is about 518.5952494904.

The spelling of 139471542 in words is "one hundred thirty-nine million, four hundred seventy-one thousand, five hundred forty-two".