145656361 has 4 divisors (see below), whose sum is σ = 145743300. Its totient is φ = 145569424.

The previous prime is 145656359. The next prime is 145656367. The reversal of 145656361 is 163656541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 163656541 = 29 ⋅5643329.

It can be written as a sum of positive squares in 2 ways, for example, as 55785961 + 89870400 = 7469^2 + 9480^2 .

It is a cyclic number.

It is not a de Polignac number, because 145656361 - 2¹ = 145656359 is a prime.

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

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 145656361.

It is not an unprimeable number, because it can be changed into a prime (145656367) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40906 + ... + 44323.

It is an arithmetic number, because the mean of its divisors is an integer number (36435825).

Almost surely, 2^145656361 is an apocalyptic number.

It is an amenable number.

145656361 is a deficient number, since it is larger than the sum of its proper divisors (86939).

145656361 is an equidigital number, since it uses as much as digits as its factorization.

145656361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86938.

The product of its digits is 64800, while the sum is 37.

The square root of 145656361 is about 12068.8177134299. The cubic root of 145656361 is about 526.1502953535.

The spelling of 145656361 in words is "one hundred forty-five million, six hundred fifty-six thousand, three hundred sixty-one".