145521069 has 16 divisors (see below), whose sum is σ = 203133312. Its totient is φ = 92489408.

The previous prime is 145521067. The next prime is 145521091. The reversal of 145521069 is 960125541.

It is a cyclic number.

It is not a de Polignac number, because 145521069 - 2¹ = 145521067 is a prime.

It is a super-2 number, since 2×145521069² = 42352763045805522, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145521067) 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, 18547 + ... + 25199.

It is an arithmetic number, because the mean of its divisors is an integer number (12695832).

Almost surely, 2^145521069 is an apocalyptic number.

It is an amenable number.

145521069 is a deficient number, since it is larger than the sum of its proper divisors (57612243).

145521069 is a wasteful number, since it uses less digits than its factorization.

145521069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6996.

The product of its (nonzero) digits is 10800, while the sum is 33.

The square root of 145521069 is about 12063.2113883493. The cubic root of 145521069 is about 525.9873410862.

The spelling of 145521069 in words is "one hundred forty-five million, five hundred twenty-one thousand, sixty-nine".