137421443 has 8 divisors (see below), whose sum is σ = 139970160. Its totient is φ = 134880160.

The previous prime is 137421437. The next prime is 137421457. The reversal of 137421443 is 344124731.

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 137421443 - 2⁶ = 137421379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137421413) 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, 47021 + ... + 49857.

It is an arithmetic number, because the mean of its divisors is an integer number (17496270).

Almost surely, 2^137421443 is an apocalyptic number.

137421443 is a deficient number, since it is larger than the sum of its proper divisors (2548717).

137421443 is an equidigital number, since it uses as much as digits as its factorization.

137421443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3717.

The product of its digits is 8064, while the sum is 29.

The square root of 137421443 is about 11722.6892392488. The cubic root of 137421443 is about 516.0417446647.

The spelling of 137421443 in words is "one hundred thirty-seven million, four hundred twenty-one thousand, four hundred forty-three".