145650521 has 2 divisors, whose sum is σ = 145650522. Its totient is φ = 145650520.

The previous prime is 145650517. The next prime is 145650539. The reversal of 145650521 is 125056541.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121992025 + 23658496 = 11045^2 + 4864^2 .

It is an emirp because it is prime and its reverse (125056541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145650521 - 2² = 145650517 is a prime.

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

It is not a weakly prime, because it can be changed into another prime (145650541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72825260 + 72825261.

It is an arithmetic number, because the mean of its divisors is an integer number (72825261).

Almost surely, 2^145650521 is an apocalyptic number.

It is an amenable number.

145650521 is a deficient number, since it is larger than the sum of its proper divisors (1).

145650521 is an equidigital number, since it uses as much as digits as its factorization.

145650521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6000, while the sum is 29.

The square root of 145650521 is about 12068.5757651846. The cubic root of 145650521 is about 526.1432633713.

The spelling of 145650521 in words is "one hundred forty-five million, six hundred fifty thousand, five hundred twenty-one".