137520142 has 4 divisors (see below), whose sum is σ = 206280216. Its totient is φ = 68760070.

The previous prime is 137520121. The next prime is 137520161. The reversal of 137520142 is 241025731.

It is a happy number.

137520142 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34380034 + ... + 34380037.

It is an arithmetic number, because the mean of its divisors is an integer number (51570054).

Almost surely, 2^137520142 is an apocalyptic number.

137520142 is a deficient number, since it is larger than the sum of its proper divisors (68760074).

137520142 is an equidigital number, since it uses as much as digits as its factorization.

137520142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68760073.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 137520142 is about 11726.8982258737. The cubic root of 137520142 is about 516.1652591475.

Adding to 137520142 its reverse (241025731), we get a palindrome (378545873).

The spelling of 137520142 in words is "one hundred thirty-seven million, five hundred twenty thousand, one hundred forty-two".