145920069 has 16 divisors (see below), whose sum is σ = 223152640. Its totient is φ = 94141440.

The previous prime is 145920043. The next prime is 145920121. The reversal of 145920069 is 960029541.

145920069 is a `hidden beast` number, since 1 + 4 + 592 + 0 + 0 + 69 = 666.

It is not a de Polignac number, because 145920069 - 2¹³ = 145911877 is a prime.

It is a super-2 number, since 2×145920069² = 42585333073929522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145920869) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86332 + ... + 88005.

It is an arithmetic number, because the mean of its divisors is an integer number (13947040).

Almost surely, 2^145920069 is an apocalyptic number.

It is an amenable number.

145920069 is a deficient number, since it is larger than the sum of its proper divisors (77232571).

145920069 is a wasteful number, since it uses less digits than its factorization.

145920069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174377 (or 174371 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 145920069 is about 12079.7379524558. The cubic root of 145920069 is about 526.4676322014.

It can be divided in two parts, 1459 and 20069, that added together give a triangular number (21528 = T₂₀₇).

The spelling of 145920069 in words is "one hundred forty-five million, nine hundred twenty thousand, sixty-nine".