15142456421 has 2 divisors, whose sum is σ = 15142456422. Its totient is φ = 15142456420.

The previous prime is 15142456369. The next prime is 15142456453. The reversal of 15142456421 is 12465424151.

15142456421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13709833921 + 1432622500 = 117089^2 + 37850^2 .

It is an emirp because it is prime and its reverse (12465424151) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15142456421 - 2¹⁰ = 15142455397 is a prime.

It is a super-3 number, since 3×15142456421³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15142456481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7571228210 + 7571228211.

It is an arithmetic number, because the mean of its divisors is an integer number (7571228211).

Almost surely, 2^15142456421 is an apocalyptic number.

It is an amenable number.

15142456421 is a deficient number, since it is larger than the sum of its proper divisors (1).

15142456421 is an equidigital number, since it uses as much as digits as its factorization.

15142456421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38400, while the sum is 35.

The spelling of 15142456421 in words is "fifteen billion, one hundred forty-two million, four hundred fifty-six thousand, four hundred twenty-one".