145052091 has 6 divisors (see below), whose sum is σ = 209519700. Its totient is φ = 96701388.

The previous prime is 145052057. The next prime is 145052093. The reversal of 145052091 is 190250541.

145052091 is a `hidden beast` number, since 1 + 4 + 50 + 520 + 91 = 666.

145052091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 145052091 - 2⁶ = 145052027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (145052093) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8058441 + ... + 8058458.

It is an arithmetic number, because the mean of its divisors is an integer number (34919950).

Almost surely, 2^145052091 is an apocalyptic number.

145052091 is a deficient number, since it is larger than the sum of its proper divisors (64467609).

145052091 is a wasteful number, since it uses less digits than its factorization.

145052091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16116905 (or 16116902 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 145052091 is about 12043.7573456127. The cubic root of 145052091 is about 525.4216911300.

The spelling of 145052091 in words is "one hundred forty-five million, fifty-two thousand, ninety-one".