145829821 has 8 divisors (see below), whose sum is σ = 152296704. Its totient is φ = 139373520.

The previous prime is 145829771. The next prime is 145829843. The reversal of 145829821 is 128928541.

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 145829821 - 2²¹ = 143732669 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 (145829881) 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, 41100 + ... + 44506.

It is an arithmetic number, because the mean of its divisors is an integer number (19037088).

Almost surely, 2^145829821 is an apocalyptic number.

It is an amenable number.

145829821 is a deficient number, since it is larger than the sum of its proper divisors (6466883).

145829821 is a wasteful number, since it uses less digits than its factorization.

145829821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5291.

The product of its digits is 46080, while the sum is 40.

The square root of 145829821 is about 12076.0018631996. The cubic root of 145829821 is about 526.3590740259.

The spelling of 145829821 in words is "one hundred forty-five million, eight hundred twenty-nine thousand, eight hundred twenty-one".