145212520 has 32 divisors (see below), whose sum is σ = 327525120. Its totient is φ = 57943360.

The previous prime is 145212503. The next prime is 145212523. The reversal of 145212520 is 25212541.

It is a junction number, because it is equal to n+sod(n) for n = 145212491 and 145212500.

It is not an unprimeable number, because it can be changed into a prime (145212523) 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, 13029 + ... + 21451.

It is an arithmetic number, because the mean of its divisors is an integer number (10235160).

Almost surely, 2^145212520 is an apocalyptic number.

145212520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145212520 is an abundant number, since it is smaller than the sum of its proper divisors (182312600).

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

145212520 is a wasteful number, since it uses less digits than its factorization.

145212520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8865 (or 8861 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 145212520 is about 12050.4157604624. The cubic root of 145212520 is about 525.6153268985.

The spelling of 145212520 in words is "one hundred forty-five million, two hundred twelve thousand, five hundred twenty".