145857471 has 16 divisors (see below), whose sum is σ = 205050240. Its totient is φ = 91968480.

The previous prime is 145857469. The next prime is 145857487. The reversal of 145857471 is 174758541.

It is not a de Polignac number, because 145857471 - 2¹ = 145857469 is a prime.

It is a super-3 number, since 3×145857471³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145857401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40036 + ... + 43526.

It is an arithmetic number, because the mean of its divisors is an integer number (12815640).

Almost surely, 2^145857471 is an apocalyptic number.

145857471 is a deficient number, since it is larger than the sum of its proper divisors (59192769).

145857471 is a wasteful number, since it uses less digits than its factorization.

145857471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4246.

The product of its digits is 156800, while the sum is 42.

The square root of 145857471 is about 12077.1466414878. The cubic root of 145857471 is about 526.3923386184.

The spelling of 145857471 in words is "one hundred forty-five million, eight hundred fifty-seven thousand, four hundred seventy-one".