145007831 has 4 divisors (see below), whose sum is σ = 148093152. Its totient is φ = 141922512.

The previous prime is 145007809. The next prime is 145007833. The reversal of 145007831 is 138700541.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 145007831 - 2⁶ = 145007767 is a prime.

It is a super-2 number, since 2×145007831² = 42054542102649122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 145007794 and 145007803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145007833) 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 3 ways as a sum of consecutive naturals, for example, 1542590 + ... + 1542683.

It is an arithmetic number, because the mean of its divisors is an integer number (37023288).

Almost surely, 2^145007831 is an apocalyptic number.

145007831 is a deficient number, since it is larger than the sum of its proper divisors (3085321).

145007831 is an equidigital number, since it uses as much as digits as its factorization.

145007831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3085320.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 145007831 is about 12041.9197389785. The cubic root of 145007831 is about 525.3682447449.

The spelling of 145007831 in words is "one hundred forty-five million, seven thousand, eight hundred thirty-one".