145413665 has 16 divisors (see below), whose sum is σ = 185178960. Its totient is φ = 109240320.

The previous prime is 145413661. The next prime is 145413673. The reversal of 145413665 is 566314541.

It can be written as a sum of positive squares in 8 ways, for example, as 19704721 + 125708944 = 4439^2 + 11212^2 .

It is not a de Polignac number, because 145413665 - 2² = 145413661 is a prime.

It is a super-2 number, since 2×145413665² = 42290267937464450, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (145413661) 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, 41585 + ... + 44945.

It is an arithmetic number, because the mean of its divisors is an integer number (11573685).

Almost surely, 2^145413665 is an apocalyptic number.

It is an amenable number.

145413665 is a deficient number, since it is larger than the sum of its proper divisors (39765295).

145413665 is a wasteful number, since it uses less digits than its factorization.

145413665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3892.

The product of its digits is 43200, while the sum is 35.

The square root of 145413665 is about 12058.7588498983. The cubic root of 145413665 is about 525.8579049640.

The spelling of 145413665 in words is "one hundred forty-five million, four hundred thirteen thousand, six hundred sixty-five".