137543421 has 8 divisors (see below), whose sum is σ = 184416480. Its totient is φ = 91182992.

The previous prime is 137543411. The next prime is 137543431. The reversal of 137543421 is 124345731.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (137543411) and next prime (137543431).

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

It is a cyclic number.

It is not a de Polignac number, because 137543421 - 2⁵ = 137543389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137543411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127530 + ... + 128603.

It is an arithmetic number, because the mean of its divisors is an integer number (23052060).

Almost surely, 2^137543421 is an apocalyptic number.

It is an amenable number.

137543421 is a deficient number, since it is larger than the sum of its proper divisors (46873059).

137543421 is a wasteful number, since it uses less digits than its factorization.

137543421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256315.

The product of its digits is 10080, while the sum is 30.

The square root of 137543421 is about 11727.8907310735. The cubic root of 137543421 is about 516.1943824767.

The spelling of 137543421 in words is "one hundred thirty-seven million, five hundred forty-three thousand, four hundred twenty-one".