145794921 has 8 divisors (see below), whose sum is σ = 194521344. Its totient is φ = 97132560.

The previous prime is 145794899. The next prime is 145794931. The reversal of 145794921 is 129497541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 145794921 - 2⁵ = 145794889 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (145794931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10425 + ... + 20006.

It is an arithmetic number, because the mean of its divisors is an integer number (24315168).

Almost surely, 2^145794921 is an apocalyptic number.

It is an amenable number.

145794921 is a deficient number, since it is larger than the sum of its proper divisors (48726423).

145794921 is a wasteful number, since it uses less digits than its factorization.

145794921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32031.

The product of its digits is 90720, while the sum is 42.

The square root of 145794921 is about 12074.5567620514. The cubic root of 145794921 is about 526.3170812493.

The spelling of 145794921 in words is "one hundred forty-five million, seven hundred ninety-four thousand, nine hundred twenty-one".