145745705 has 32 divisors (see below), whose sum is σ = 206578944. Its totient is φ = 96638976.

The previous prime is 145745689. The next prime is 145745711. The reversal of 145745705 is 507547541.

145745705 = 1820² + 1821² + ... + 1862².

It is not a de Polignac number, because 145745705 - 2⁴ = 145745689 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 169637 + ... + 170493.

It is an arithmetic number, because the mean of its divisors is an integer number (6455592).

Almost surely, 2^145745705 is an apocalyptic number.

It is an amenable number.

145745705 is a deficient number, since it is larger than the sum of its proper divisors (60833239).

145745705 is a wasteful number, since it uses less digits than its factorization.

145745705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1025.

The product of its (nonzero) digits is 98000, while the sum is 38.

The square root of 145745705 is about 12072.5185856142. The cubic root of 145745705 is about 526.2578516214.

The spelling of 145745705 in words is "one hundred forty-five million, seven hundred forty-five thousand, seven hundred five".