145142885 has 8 divisors (see below), whose sum is σ = 177458040. Its totient is φ = 113923264.

The previous prime is 145142831. The next prime is 145142887. The reversal of 145142885 is 588241541.

It can be written as a sum of positive squares in 4 ways, for example, as 2316484 + 142826401 = 1522^2 + 11951^2 .

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 145142885 - 2¹² = 145138789 is a prime.

It is a super-2 number, since 2×145142885² = 42132914132246450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145142887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 273590 + ... + 274119.

It is an arithmetic number, because the mean of its divisors is an integer number (22182255).

Almost surely, 2^145142885 is an apocalyptic number.

It is an amenable number.

145142885 is a deficient number, since it is larger than the sum of its proper divisors (32315155).

145142885 is an equidigital number, since it uses as much as digits as its factorization.

145142885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547767.

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

The square root of 145142885 is about 12047.5260945972. The cubic root of 145142885 is about 525.5312958627.

The spelling of 145142885 in words is "one hundred forty-five million, one hundred forty-two thousand, eight hundred eighty-five".