5142649 has 4 divisors (see below), whose sum is σ = 5195764. Its totient is φ = 5089536.

The previous prime is 5142647. The next prime is 5142661. The reversal of 5142649 is 9462415.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3861225 + 1281424 = 1965^2 + 1132^2 .

It is a cyclic number.

It is not a de Polignac number, because 5142649 - 2¹ = 5142647 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5142649.

It is not an unprimeable number, because it can be changed into a prime (5142647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26412 + ... + 26605.

It is an arithmetic number, because the mean of its divisors is an integer number (1298941).

Almost surely, 2^5142649 is an apocalyptic number.

It is an amenable number.

5142649 is a deficient number, since it is larger than the sum of its proper divisors (53115).

5142649 is an equidigital number, since it uses as much as digits as its factorization.

5142649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53114.

The product of its digits is 8640, while the sum is 31.

The square root of 5142649 is about 2267.7409464046. The cubic root of 5142649 is about 172.6085461195.

The spelling of 5142649 in words is "five million, one hundred forty-two thousand, six hundred forty-nine".