148536421 has 4 divisors (see below), whose sum is σ = 162039744. Its totient is φ = 135033100.

The previous prime is 148536397. The next prime is 148536431. The reversal of 148536421 is 124635841.

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 not a de Polignac number, because 148536421 - 2²¹ = 146439269 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 (148536431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6751645 + ... + 6751666.

It is an arithmetic number, because the mean of its divisors is an integer number (40509936).

Almost surely, 2^148536421 is an apocalyptic number.

148536421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

148536421 is a deficient number, since it is larger than the sum of its proper divisors (13503323).

148536421 is a wasteful number, since it uses less digits than its factorization.

148536421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13503322.

The product of its digits is 23040, while the sum is 34.

The square root of 148536421 is about 12187.5518870690. The cubic root of 148536421 is about 529.5955392910.

The spelling of 148536421 in words is "one hundred forty-eight million, five hundred thirty-six thousand, four hundred twenty-one".