145045731 has 8 divisors (see below), whose sum is σ = 193832640. Its totient is φ = 96477992.

The previous prime is 145045729. The next prime is 145045757. The reversal of 145045731 is 137540541.

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

It is a cyclic number.

It is not a de Polignac number, because 145045731 - 2¹ = 145045729 is a prime.

It is a super-2 number, since 2×145045731² = 42076528162648722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (145045721) 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 7 ways as a sum of consecutive naturals, for example, 53241 + ... + 55898.

It is an arithmetic number, because the mean of its divisors is an integer number (24229080).

Almost surely, 2^145045731 is an apocalyptic number.

145045731 is a deficient number, since it is larger than the sum of its proper divisors (48786909).

145045731 is a wasteful number, since it uses less digits than its factorization.

145045731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109585.

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 145045731 is about 12043.4933055156. The cubic root of 145045731 is about 525.4140117491.

The spelling of 145045731 in words is "one hundred forty-five million, forty-five thousand, seven hundred thirty-one".