124017987 has 4 divisors (see below), whose sum is σ = 165357320. Its totient is φ = 82678656.

The previous prime is 124017983. The next prime is 124018003. The reversal of 124017987 is 789710421.

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

It is not a de Polignac number, because 124017987 - 2² = 124017983 is a prime.

It is a super-2 number, since 2×124017987² = 30760922199064338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (124017983) 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, 20669662 + ... + 20669667.

It is an arithmetic number, because the mean of its divisors is an integer number (41339330).

Almost surely, 2^124017987 is an apocalyptic number.

124017987 is a deficient number, since it is larger than the sum of its proper divisors (41339333).

124017987 is an equidigital number, since it uses as much as digits as its factorization.

124017987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41339332.

The product of its (nonzero) digits is 28224, while the sum is 39.

The square root of 124017987 is about 11136.3363365157. The cubic root of 124017987 is about 498.6872054912.

The spelling of 124017987 in words is "one hundred twenty-four million, seventeen thousand, nine hundred eighty-seven".