145731746 has 8 divisors (see below), whose sum is σ = 219044304. Its totient is φ = 72716980.

The previous prime is 145731739. The next prime is 145731763. The reversal of 145731746 is 647137541.

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

It is an unprimeable number.

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, 73220 + ... + 75183.

It is an arithmetic number, because the mean of its divisors is an integer number (27380538).

Almost surely, 2^145731746 is an apocalyptic number.

145731746 is a deficient number, since it is larger than the sum of its proper divisors (73312558).

145731746 is a wasteful number, since it uses less digits than its factorization.

145731746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148896.

The product of its digits is 70560, while the sum is 38.

The square root of 145731746 is about 12071.9404405423. The cubic root of 145731746 is about 526.2410500563.

The spelling of 145731746 in words is "one hundred forty-five million, seven hundred thirty-one thousand, seven hundred forty-six".