145221570 has 48 divisors (see below), whose sum is σ = 406623672. Its totient is φ = 35746560.

The previous prime is 145221547. The next prime is 145221581. The reversal of 145221570 is 75122541.

It can be written as a sum of positive squares in 4 ways, for example, as 90269001 + 54952569 = 9501^2 + 7413^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60891 + ... + 63230.

Almost surely, 2^145221570 is an apocalyptic number.

145221570 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

145221570 is an abundant number, since it is smaller than the sum of its proper divisors (261402102).

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

145221570 is a wasteful number, since it uses less digits than its factorization.

145221570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124147 (or 124144 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The square root of 145221570 is about 12050.7912603281. The cubic root of 145221570 is about 525.6262458833.

The spelling of 145221570 in words is "one hundred forty-five million, two hundred twenty-one thousand, five hundred seventy".