145885421 has 8 divisors (see below), whose sum is σ = 163029888. Its totient is φ = 129388000.

The previous prime is 145885417. The next prime is 145885423. The reversal of 145885421 is 124588541.

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 145885421 - 2² = 145885417 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 (145885423) 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, 161285 + ... + 162186.

It is an arithmetic number, because the mean of its divisors is an integer number (20378736).

Almost surely, 2^145885421 is an apocalyptic number.

145885421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

145885421 is a deficient number, since it is larger than the sum of its proper divisors (17144467).

145885421 is a wasteful number, since it uses less digits than its factorization.

145885421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323523.

The product of its digits is 51200, while the sum is 38.

The square root of 145885421 is about 12078.3037302429. The cubic root of 145885421 is about 526.4259598562.

The spelling of 145885421 in words is "one hundred forty-five million, eight hundred eighty-five thousand, four hundred twenty-one".