145501987 has 2 divisors, whose sum is σ = 145501988. Its totient is φ = 145501986.

The previous prime is 145501931. The next prime is 145501999. The reversal of 145501987 is 789105541.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145501987 is a prime.

It is not a weakly prime, because it can be changed into another prime (145511987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72750993 + 72750994.

It is an arithmetic number, because the mean of its divisors is an integer number (72750994).

Almost surely, 2^145501987 is an apocalyptic number.

145501987 is a deficient number, since it is larger than the sum of its proper divisors (1).

145501987 is an equidigital number, since it uses as much as digits as its factorization.

145501987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50400, while the sum is 40.

The square root of 145501987 is about 12062.4204453335. The cubic root of 145501987 is about 525.9643493888.

The spelling of 145501987 in words is "one hundred forty-five million, five hundred one thousand, nine hundred eighty-seven".