146626021 has 4 divisors (see below), whose sum is σ = 154343200. Its totient is φ = 138908844.

The previous prime is 146626013. The next prime is 146626027. The reversal of 146626021 is 120626641.

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 146626021 - 2³ = 146626013 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 (146626027) 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, 3858561 + ... + 3858598.

It is an arithmetic number, because the mean of its divisors is an integer number (38585800).

Almost surely, 2^146626021 is an apocalyptic number.

It is an amenable number.

146626021 is a deficient number, since it is larger than the sum of its proper divisors (7717179).

146626021 is an equidigital number, since it uses as much as digits as its factorization.

146626021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7717178.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 146626021 is about 12108.9231973780. The cubic root of 146626021 is about 527.3152723489.

The spelling of 146626021 in words is "one hundred forty-six million, six hundred twenty-six thousand, twenty-one".