145894145 has 16 divisors (see below), whose sum is σ = 180839568. Its totient is φ = 112907520.

The previous prime is 145894139. The next prime is 145894159. The reversal of 145894145 is 541498541.

It can be written as a sum of positive squares in 8 ways, for example, as 5424241 + 140469904 = 2329^2 + 11852^2 .

It is not a de Polignac number, because 145894145 - 2⁶ = 145894081 is a prime.

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

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31307 + ... + 35663.

It is an arithmetic number, because the mean of its divisors is an integer number (11302473).

Almost surely, 2^145894145 is an apocalyptic number.

It is an amenable number.

145894145 is a deficient number, since it is larger than the sum of its proper divisors (34945423).

145894145 is a wasteful number, since it uses less digits than its factorization.

145894145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4580.

The product of its digits is 115200, while the sum is 41.

The square root of 145894145 is about 12078.6648682708. The cubic root of 145894145 is about 526.4364531335.

The spelling of 145894145 in words is "one hundred forty-five million, eight hundred ninety-four thousand, one hundred forty-five".