146236421 has 4 divisors (see below), whose sum is σ = 149637312. Its totient is φ = 142835532.

The previous prime is 146236399. The next prime is 146236427. The reversal of 146236421 is 124632641.

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 146236421 - 2¹⁴ = 146220037 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 (146236427) 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, 1700381 + ... + 1700466.

It is an arithmetic number, because the mean of its divisors is an integer number (37409328).

Almost surely, 2^146236421 is an apocalyptic number.

It is an amenable number.

146236421 is a deficient number, since it is larger than the sum of its proper divisors (3400891).

146236421 is an equidigital number, since it uses as much as digits as its factorization.

146236421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3400890.

The product of its digits is 6912, while the sum is 29.

The square root of 146236421 is about 12092.8251868618. The cubic root of 146236421 is about 526.8478149408.

The spelling of 146236421 in words is "one hundred forty-six million, two hundred thirty-six thousand, four hundred twenty-one".