145074561 has 16 divisors (see below), whose sum is σ = 198618816. Its totient is φ = 94139136.

The previous prime is 145074551. The next prime is 145074563. The reversal of 145074561 is 165470541.

It is not a de Polignac number, because 145074561 - 2¹⁸ = 144812417 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (145074563) 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 15 ways as a sum of consecutive naturals, for example, 38581 + ... + 42173.

It is an arithmetic number, because the mean of its divisors is an integer number (12413676).

Almost surely, 2^145074561 is an apocalyptic number.

It is an amenable number.

145074561 is a deficient number, since it is larger than the sum of its proper divisors (53544255).

145074561 is a wasteful number, since it uses less digits than its factorization.

145074561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3952.

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 145074561 is about 12044.6901579078. The cubic root of 145074561 is about 525.4488207305.

The spelling of 145074561 in words is "one hundred forty-five million, seventy-four thousand, five hundred sixty-one".