145719987 has 16 divisors (see below), whose sum is σ = 233736960. Its totient is φ = 78885792.

The previous prime is 145719961. The next prime is 145719989. The reversal of 145719987 is 789917541.

It is a happy number.

145719987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 145719987 - 2⁶ = 145719923 is a prime.

It is a super-2 number, since 2×145719987² = 42468629222560338, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (145719989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 182208 + ... + 183005.

It is an arithmetic number, because the mean of its divisors is an integer number (14608560).

Almost surely, 2^145719987 is an apocalyptic number.

145719987 is a deficient number, since it is larger than the sum of its proper divisors (88016973).

145719987 is a wasteful number, since it uses less digits than its factorization.

145719987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365242.

The product of its digits is 635040, while the sum is 51.

The square root of 145719987 is about 12071.4533921976. The cubic root of 145719987 is about 526.2268956593.

The spelling of 145719987 in words is "one hundred forty-five million, seven hundred nineteen thousand, nine hundred eighty-seven".