137421253 has 4 divisors (see below), whose sum is σ = 138140928. Its totient is φ = 136701580.

The previous prime is 137421247. The next prime is 137421283. The reversal of 137421253 is 352124731.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137421253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137421203) by changing a digit.

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, 359551 + ... + 359932.

It is an arithmetic number, because the mean of its divisors is an integer number (34535232).

Almost surely, 2^137421253 is an apocalyptic number.

It is an amenable number.

137421253 is a deficient number, since it is larger than the sum of its proper divisors (719675).

137421253 is an equidigital number, since it uses as much as digits as its factorization.

137421253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719674.

The product of its digits is 5040, while the sum is 28.

The square root of 137421253 is about 11722.6811353035. The cubic root of 137421253 is about 516.0415068368.

Adding to 137421253 its reverse (352124731), we get a palindrome (489545984).

The spelling of 137421253 in words is "one hundred thirty-seven million, four hundred twenty-one thousand, two hundred fifty-three".