2587167421 has 2 divisors, whose sum is σ = 2587167422. Its totient is φ = 2587167420.

The previous prime is 2587167307. The next prime is 2587167449. The reversal of 2587167421 is 1247617852.

2587167421 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., 1625299225 + 961868196 = 40315^2 + 31014^2 .

It is a cyclic number.

It is not a de Polignac number, because 2587167421 - 2⁹ = 2587166909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2587167481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1293583710 + 1293583711.

It is an arithmetic number, because the mean of its divisors is an integer number (1293583711).

Almost surely, 2^2587167421 is an apocalyptic number.

It is an amenable number.

2587167421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2587167421 is an equidigital number, since it uses as much as digits as its factorization.

2587167421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 188160, while the sum is 43.

The square root of 2587167421 is about 50864.2056951645. The cubic root of 2587167421 is about 1372.8028682988.

The spelling of 2587167421 in words is "two billion, five hundred eighty-seven million, one hundred sixty-seven thousand, four hundred twenty-one".