145365691 has 8 divisors (see below), whose sum is σ = 154047744. Its totient is φ = 136698240.

The previous prime is 145365683. The next prime is 145365733. The reversal of 145365691 is 196563541.

It is a happy number.

145365691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 145365691 - 2³ = 145365683 is a prime.

It is a super-2 number, since 2×145365691² = 42262368239814962, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (145365611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22101 + ... + 27913.

It is an arithmetic number, because the mean of its divisors is an integer number (19255968).

Almost surely, 2^145365691 is an apocalyptic number.

145365691 is a deficient number, since it is larger than the sum of its proper divisors (8682053).

145365691 is a wasteful number, since it uses less digits than its factorization.

145365691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7301.

The product of its digits is 97200, while the sum is 40.

The square root of 145365691 is about 12056.7695092840. The cubic root of 145365691 is about 525.8000693130.

The spelling of 145365691 in words is "one hundred forty-five million, three hundred sixty-five thousand, six hundred ninety-one".