137243026 has 4 divisors (see below), whose sum is σ = 205864542. Its totient is φ = 68621512.

The previous prime is 137243017. The next prime is 137243039. The reversal of 137243026 is 620342731.

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

It can be written as a sum of positive squares in only one way, i.e., 130988025 + 6255001 = 11445^2 + 2501^2 .

It is a junction number, because it is equal to n+sod(n) for n = 137242985 and 137243003.

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 as a sum of consecutive naturals, namely, 34310755 + ... + 34310758.

Almost surely, 2^137243026 is an apocalyptic number.

137243026 is a deficient number, since it is larger than the sum of its proper divisors (68621516).

137243026 is an equidigital number, since it uses as much as digits as its factorization.

137243026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68621515.

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 137243026 is about 11715.0768670120. The cubic root of 137243026 is about 515.8183188480.

Adding to 137243026 its reverse (620342731), we get a palindrome (757585757).

The spelling of 137243026 in words is "one hundred thirty-seven million, two hundred forty-three thousand, twenty-six".