145000731 has 8 divisors (see below), whose sum is σ = 193403920. Its totient is φ = 96632352.

The previous prime is 145000711. The next prime is 145000747. The reversal of 145000731 is 137000541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 145000731 - 2⁵ = 145000699 is a prime.

It is a super-2 number, since 2×145000731² = 42050423981068722, 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 = 145000698 and 145000707.

It is not an unprimeable number, because it can be changed into a prime (145000711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3441 + ... + 17373.

It is an arithmetic number, because the mean of its divisors is an integer number (24175490).

Almost surely, 2^145000731 is an apocalyptic number.

145000731 is a deficient number, since it is larger than the sum of its proper divisors (48403189).

145000731 is a wasteful number, since it uses less digits than its factorization.

145000731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17405.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 145000731 is about 12041.6249318769. The cubic root of 145000731 is about 525.3596700921.

The spelling of 145000731 in words is "one hundred forty-five million, seven hundred thirty-one", and thus it is an aban number.