1254021487 has 2 divisors, whose sum is σ = 1254021488. Its totient is φ = 1254021486.

The previous prime is 1254021437. The next prime is 1254021539. The reversal of 1254021487 is 7841204521.

It is a weak prime.

It is an emirp because it is prime and its reverse (7841204521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1254021487 - 2¹⁹ = 1253497199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1254021407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627010743 + 627010744.

It is an arithmetic number, because the mean of its divisors is an integer number (627010744).

Almost surely, 2^1254021487 is an apocalyptic number.

1254021487 is a deficient number, since it is larger than the sum of its proper divisors (1).

1254021487 is an equidigital number, since it uses as much as digits as its factorization.

1254021487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17920, while the sum is 34.

The square root of 1254021487 is about 35412.1658049885. The cubic root of 1254021487 is about 1078.3713125349.

The spelling of 1254021487 in words is "one billion, two hundred fifty-four million, twenty-one thousand, four hundred eighty-seven".