1250421563 has 2 divisors, whose sum is σ = 1250421564. Its totient is φ = 1250421562.

The previous prime is 1250421551. The next prime is 1250421577. The reversal of 1250421563 is 3651240521.

It is a weak prime.

It is an emirp because it is prime and its reverse (3651240521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1250421563 - 2⁶ = 1250421499 is a prime.

It is not a weakly prime, because it can be changed into another prime (1250421503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625210781 + 625210782.

It is an arithmetic number, because the mean of its divisors is an integer number (625210782).

Almost surely, 2^1250421563 is an apocalyptic number.

1250421563 is a deficient number, since it is larger than the sum of its proper divisors (1).

1250421563 is an equidigital number, since it uses as much as digits as its factorization.

1250421563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 1250421563 is about 35361.3003578771. The cubic root of 1250421563 is about 1077.3384287319.

The spelling of 1250421563 in words is "one billion, two hundred fifty million, four hundred twenty-one thousand, five hundred sixty-three".