145241391 has 16 divisors (see below), whose sum is σ = 200474624. Its totient is φ = 93459744.

The previous prime is 145241381. The next prime is 145241399. The reversal of 145241391 is 193142541.

It is not a de Polignac number, because 145241391 - 2¹⁴ = 145225007 is a prime.

It is a super-2 number, since 2×145241391² = 42190123319229762, which contains 22 as substring.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145241399) 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 15 ways as a sum of consecutive naturals, for example, 8946 + ... + 19248.

It is an arithmetic number, because the mean of its divisors is an integer number (12529664).

Almost surely, 2^145241391 is an apocalyptic number.

145241391 is a deficient number, since it is larger than the sum of its proper divisors (55233233).

145241391 is a wasteful number, since it uses less digits than its factorization.

145241391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10470.

The product of its digits is 4320, while the sum is 30.

The square root of 145241391 is about 12051.6136263987. The cubic root of 145241391 is about 525.6501586851.

The spelling of 145241391 in words is "one hundred forty-five million, two hundred forty-one thousand, three hundred ninety-one".