5142157421 has 2 divisors, whose sum is σ = 5142157422. Its totient is φ = 5142157420.

The previous prime is 5142157411. The next prime is 5142157439. The reversal of 5142157421 is 1247512415.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4872738025 + 269419396 = 69805^2 + 16414^2 .

It is a cyclic number.

It is not a de Polignac number, because 5142157421 - 2¹⁸ = 5141895277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5142157411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2571078710 + 2571078711.

It is an arithmetic number, because the mean of its divisors is an integer number (2571078711).

Almost surely, 2^5142157421 is an apocalyptic number.

It is an amenable number.

5142157421 is a deficient number, since it is larger than the sum of its proper divisors (1).

5142157421 is an equidigital number, since it uses as much as digits as its factorization.

5142157421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11200, while the sum is 32.

The square root of 5142157421 is about 71708.8378165481. The cubic root of 5142157421 is about 1726.0304613685.

Adding to 5142157421 its reverse (1247512415), we get a palindrome (6389669836).

The spelling of 5142157421 in words is "five billion, one hundred forty-two million, one hundred fifty-seven thousand, four hundred twenty-one".