145091601 has 16 divisors (see below), whose sum is σ = 215197120. Its totient is φ = 96616800.

The previous prime is 145091593. The next prime is 145091621. The reversal of 145091601 is 106190541.

145091601 is a `hidden beast` number, since 1 + 4 + 50 + 9 + 1 + 601 = 666.

It is not a de Polignac number, because 145091601 - 2³ = 145091593 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145091621) 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, 25821 + ... + 30933.

It is an arithmetic number, because the mean of its divisors is an integer number (13449820).

Almost surely, 2^145091601 is an apocalyptic number.

It is an amenable number.

145091601 is a deficient number, since it is larger than the sum of its proper divisors (70105519).

145091601 is a wasteful number, since it uses less digits than its factorization.

145091601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6173 (or 6167 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 145091601 is about 12045.3975027809. The cubic root of 145091601 is about 525.4693924450.

It can be divided in two parts, 14509 and 1601, that added together give a triangular number (16110 = T₁₇₉).

The spelling of 145091601 in words is "one hundred forty-five million, ninety-one thousand, six hundred one".