145565720 has 16 divisors (see below), whose sum is σ = 327522960. Its totient is φ = 58226272.

The previous prime is 145565711. The next prime is 145565729. The reversal of 145565720 is 27565541.

It is an interprime number because it is at equal distance from previous prime (145565711) and next prime (145565729).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145565729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1819532 + ... + 1819611.

It is an arithmetic number, because the mean of its divisors is an integer number (20470185).

Almost surely, 2^145565720 is an apocalyptic number.

145565720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145565720 is an abundant number, since it is smaller than the sum of its proper divisors (181957240).

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

145565720 is a wasteful number, since it uses less digits than its factorization.

145565720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3639154 (or 3639150 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 35.

The square root of 145565720 is about 12065.0619559122. The cubic root of 145565720 is about 526.0411327450.

The spelling of 145565720 in words is "one hundred forty-five million, five hundred sixty-five thousand, seven hundred twenty".