145987 has 2 divisors, whose sum is σ = 145988. Its totient is φ = 145986.

The previous prime is 145969. The next prime is 145991. The reversal of 145987 is 789541.

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-145987 is a prime.

It is a super-3 number, since 3×145987³ = 9333914250059409, which contains 333 as substring.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (145967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72993 + 72994.

It is an arithmetic number, because the mean of its divisors is an integer number (72994).

2¹⁴⁵⁹⁸⁷ is an apocalyptic number.

145987 is a deficient number, since it is larger than the sum of its proper divisors (1).

145987 is an equidigital number, since it uses as much as digits as its factorization.

145987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 34.

The square root of 145987 is about 382.0824518347. The cubic root of 145987 is about 52.6548113749.

The spelling of 145987 in words is "one hundred forty-five thousand, nine hundred eighty-seven".