1321754519 has 2 divisors, whose sum is σ = 1321754520. Its totient is φ = 1321754518.

The previous prime is 1321754503. The next prime is 1321754569. The reversal of 1321754519 is 9154571231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1321754519 - 2⁴ = 1321754503 is a prime.

It is a super-2 number, since 2×1321754519² = 3494070016993842722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321754569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660877259 + 660877260.

It is an arithmetic number, because the mean of its divisors is an integer number (660877260).

Almost surely, 2^1321754519 is an apocalyptic number.

1321754519 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321754519 is an equidigital number, since it uses as much as digits as its factorization.

1321754519 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37800, while the sum is 38.

The square root of 1321754519 is about 36355.9420040246. The cubic root of 1321754519 is about 1097.4471153752.

The spelling of 1321754519 in words is "one billion, three hundred twenty-one million, seven hundred fifty-four thousand, five hundred nineteen".