145122865 has 4 divisors (see below), whose sum is σ = 174147444. Its totient is φ = 116098288.

The previous prime is 145122853. The next prime is 145122877. The reversal of 145122865 is 568221541.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 568221541 = 20129 ⋅28229.

It is an interprime number because it is at equal distance from previous prime (145122853) and next prime (145122877).

It can be written as a sum of positive squares in 2 ways, for example, as 104060401 + 41062464 = 10201^2 + 6408^2 .

It is a cyclic number.

It is not a de Polignac number, because 145122865 - 2¹¹ = 145120817 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 145122865.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14512282 + ... + 14512291.

It is an arithmetic number, because the mean of its divisors is an integer number (43536861).

Almost surely, 2^145122865 is an apocalyptic number.

It is an amenable number.

145122865 is a deficient number, since it is larger than the sum of its proper divisors (29024579).

145122865 is an equidigital number, since it uses as much as digits as its factorization.

145122865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29024578.

The product of its digits is 19200, while the sum is 34.

The square root of 145122865 is about 12046.6951899681. The cubic root of 145122865 is about 525.5071320411.

The spelling of 145122865 in words is "one hundred forty-five million, one hundred twenty-two thousand, eight hundred sixty-five".