124742491 has 4 divisors (see below), whose sum is σ = 124990992. Its totient is φ = 124493992.

The previous prime is 124742479. The next prime is 124742521. The reversal of 124742491 is 194247421.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 194247421 = 461 ⋅421361.

It is a cyclic number.

It is not a de Polignac number, because 124742491 - 2⁹ = 124741979 is a prime.

It is a super-4 number, since 4×124742491⁴ (a number of 33 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (124712491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123496 + ... + 124501.

It is an arithmetic number, because the mean of its divisors is an integer number (31247748).

Almost surely, 2^124742491 is an apocalyptic number.

124742491 is a deficient number, since it is larger than the sum of its proper divisors (248501).

124742491 is an equidigital number, since it uses as much as digits as its factorization.

124742491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248500.

The product of its digits is 16128, while the sum is 34.

The square root of 124742491 is about 11168.8177977797. The cubic root of 124742491 is about 499.6564186244.

The spelling of 124742491 in words is "one hundred twenty-four million, seven hundred forty-two thousand, four hundred ninety-one".