145136987 has 4 divisors (see below), whose sum is σ = 148225056. Its totient is φ = 142048920.

The previous prime is 145136951. The next prime is 145137011. The reversal of 145136987 is 789631541.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 145136987 - 2⁸ = 145136731 is a prime.

It is a Duffinian number.

It is a zygodrome in base 6.

It is not an unprimeable number, because it can be changed into a prime (145136917) 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, 1543964 + ... + 1544057.

It is an arithmetic number, because the mean of its divisors is an integer number (37056264).

Almost surely, 2^145136987 is an apocalyptic number.

145136987 is a deficient number, since it is larger than the sum of its proper divisors (3088069).

145136987 is an equidigital number, since it uses as much as digits as its factorization.

145136987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3088068.

The product of its digits is 181440, while the sum is 44.

The square root of 145136987 is about 12047.2813115657. The cubic root of 145136987 is about 525.5241773014.

The spelling of 145136987 in words is "one hundred forty-five million, one hundred thirty-six thousand, nine hundred eighty-seven".