137242730 has 8 divisors (see below), whose sum is σ = 247036932. Its totient is φ = 54897088.

The previous prime is 137242727. The next prime is 137242747. The reversal of 137242730 is 37242731.

It can be written as a sum of positive squares in 2 ways, for example, as 135652609 + 1590121 = 11647^2 + 1261^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 137242693 and 137242702.

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 3 ways as a sum of consecutive naturals, for example, 6862127 + ... + 6862146.

Almost surely, 2^137242730 is an apocalyptic number.

137242730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

137242730 is a deficient number, since it is larger than the sum of its proper divisors (109794202).

137242730 is a wasteful number, since it uses less digits than its factorization.

137242730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13724280.

The product of its (nonzero) digits is 7056, while the sum is 29.

The square root of 137242730 is about 11715.0642337121. The cubic root of 137242730 is about 515.8179480159.

Subtracting from 137242730 its reverse (37242731), we obtain a palindrome (99999999).

The spelling of 137242730 in words is "one hundred thirty-seven million, two hundred forty-two thousand, seven hundred thirty".