137055421 has 8 divisors (see below), whose sum is σ = 141946200. Its totient is φ = 132175680.

The previous prime is 137055409. The next prime is 137055439. The reversal of 137055421 is 124550731.

It is a happy number.

137055421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 39816100 + 97239321 = 6310^2 + 9861^2 .

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 137055421 - 2⁵ = 137055389 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 137055421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137055481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28791 + ... + 33211.

It is an arithmetic number, because the mean of its divisors is an integer number (17743275).

Almost surely, 2^137055421 is an apocalyptic number.

It is an amenable number.

137055421 is a deficient number, since it is larger than the sum of its proper divisors (4890779).

137055421 is a wasteful number, since it uses less digits than its factorization.

137055421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5519.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 137055421 is about 11707.0671391258. The cubic root of 137055421 is about 515.5831782474.

The spelling of 137055421 in words is "one hundred thirty-seven million, fifty-five thousand, four hundred twenty-one".