145535691 has 64 divisors (see below), whose sum is σ = 245984256. Its totient is φ = 74649600.

The previous prime is 145535681. The next prime is 145535701. The reversal of 145535691 is 196535541.

It is a happy number.

145535691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (145535681) and next prime (145535701).

It is not a de Polignac number, because 145535691 - 2¹⁰ = 145534667 is a prime.

It is not an unprimeable number, because it can be changed into a prime (145535671) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 892776 + ... + 892938.

It is an arithmetic number, because the mean of its divisors is an integer number (3843504).

Almost surely, 2^145535691 is an apocalyptic number.

145535691 is a deficient number, since it is larger than the sum of its proper divisors (100448565).

145535691 is a wasteful number, since it uses less digits than its factorization.

145535691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292.

The product of its digits is 81000, while the sum is 39.

The square root of 145535691 is about 12063.8174306477. The cubic root of 145535691 is about 526.0049576174.

The spelling of 145535691 in words is "one hundred forty-five million, five hundred thirty-five thousand, six hundred ninety-one".