145772091 has 12 divisors (see below), whose sum is σ = 219714768. Its totient is φ = 92955984.

The previous prime is 145772087. The next prime is 145772111. The reversal of 145772091 is 190277541.

It is a happy number.

It is not a de Polignac number, because 145772091 - 2² = 145772087 is a prime.

It is not an unprimeable number, because it can be changed into a prime (145772071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 351900 + ... + 352313.

It is an arithmetic number, because the mean of its divisors is an integer number (18309564).

Almost surely, 2^145772091 is an apocalyptic number.

145772091 is a deficient number, since it is larger than the sum of its proper divisors (73942677).

145772091 is a wasteful number, since it uses less digits than its factorization.

145772091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704242 (or 704239 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 36.

The square root of 145772091 is about 12073.6113487225. The cubic root of 145772091 is about 526.2896078501.

The spelling of 145772091 in words is "one hundred forty-five million, seven hundred seventy-two thousand, ninety-one".