137490842 has 4 divisors (see below), whose sum is σ = 206236266. Its totient is φ = 68745420.

The previous prime is 137490841. The next prime is 137490863. The reversal of 137490842 is 248094731.

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., 135745801 + 1745041 = 11651^2 + 1321^2 .

It is a junction number, because it is equal to n+sod(n) for n = 137490796 and 137490805.

It is not an unprimeable number, because it can be changed into a prime (137490841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34372709 + ... + 34372712.

Almost surely, 2^137490842 is an apocalyptic number.

137490842 is a deficient number, since it is larger than the sum of its proper divisors (68745424).

137490842 is an equidigital number, since it uses as much as digits as its factorization.

137490842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68745423.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 137490842 is about 11725.6488946241. The cubic root of 137490842 is about 516.1285985389.

The spelling of 137490842 in words is "one hundred thirty-seven million, four hundred ninety thousand, eight hundred forty-two".