139145052 has 12 divisors (see below), whose sum is σ = 324671816. Its totient is φ = 46381680.

The previous prime is 139145029. The next prime is 139145057. The reversal of 139145052 is 250541931.

139145052 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×139145052² = 38722690992165408, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139145057) 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, 5797699 + ... + 5797722.

Almost surely, 2^139145052 is an apocalyptic number.

139145052 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

139145052 is an abundant number, since it is smaller than the sum of its proper divisors (185526764).

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

139145052 is a wasteful number, since it uses less digits than its factorization.

139145052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11595428 (or 11595426 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 139145052 is about 11795.9760935668. The cubic root of 139145052 is about 518.1902721249.

Adding to 139145052 its reverse (250541931), we get a palindrome (389686983).

The spelling of 139145052 in words is "one hundred thirty-nine million, one hundred forty-five thousand, fifty-two".