145309501 has 2 divisors, whose sum is σ = 145309502. Its totient is φ = 145309500.

The previous prime is 145309487. The next prime is 145309529. The reversal of 145309501 is 105903541.

It is an a-pointer prime, because the next prime (145309529) can be obtained adding 145309501 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142229476 + 3080025 = 11926^2 + 1755^2 .

It is an emirp because it is prime and its reverse (105903541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145309501 - 2¹⁹ = 144785213 is a prime.

It is a super-2 number, since 2×145309501² = 42229702161738002, which contains 22 as substring.

It is equal to p_8195014 and since 145309501 and 8195014 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 145309501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145309301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72654750 + 72654751.

It is an arithmetic number, because the mean of its divisors is an integer number (72654751).

Almost surely, 2^145309501 is an apocalyptic number.

It is an amenable number.

145309501 is a deficient number, since it is larger than the sum of its proper divisors (1).

145309501 is an equidigital number, since it uses as much as digits as its factorization.

145309501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 145309501 is about 12054.4390578741. The cubic root of 145309501 is about 525.7323125788.

The spelling of 145309501 in words is "one hundred forty-five million, three hundred nine thousand, five hundred one".