145021000 has 32 divisors (see below), whose sum is σ = 339351480. Its totient is φ = 58008000.

The previous prime is 145020989. The next prime is 145021021. The reversal of 145021000 is 120541.

It can be written as a sum of positive squares in 4 ways, for example, as 18818244 + 126202756 = 4338^2 + 11234^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71511 + ... + 73510.

Almost surely, 2^145021000 is an apocalyptic number.

145021000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145021000 is an abundant number, since it is smaller than the sum of its proper divisors (194330480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

145021000 is a wasteful number, since it uses less digits than its factorization.

145021000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145042 (or 145028 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 145021000 is about 12042.4665247614. The cubic root of 145021000 is about 525.3841481734.

Adding to 145021000 its reverse (120541), we get a palindrome (145141541).

The spelling of 145021000 in words is "one hundred forty-five million, twenty-one thousand".