1321250419 has 2 divisors, whose sum is σ = 1321250420. Its totient is φ = 1321250418.

The previous prime is 1321250363. The next prime is 1321250467. The reversal of 1321250419 is 9140521231.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1321250419 - 2¹⁷ = 1321119347 is a prime.

It is a super-2 number, since 2×1321250419² = 3491405339415351122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1321250219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660625209 + 660625210.

It is an arithmetic number, because the mean of its divisors is an integer number (660625210).

Almost surely, 2^1321250419 is an apocalyptic number.

1321250419 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321250419 is an equidigital number, since it uses as much as digits as its factorization.

1321250419 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 1321250419 is about 36349.0085009206. The cubic root of 1321250419 is about 1097.3075802779.

The spelling of 1321250419 in words is "one billion, three hundred twenty-one million, two hundred fifty thousand, four hundred nineteen".