1220725019 has 2 divisors, whose sum is σ = 1220725020. Its totient is φ = 1220725018.

The previous prime is 1220725007. The next prime is 1220725039. The reversal of 1220725019 is 9105270221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1220725019 - 2⁴ = 1220725003 is a prime.

It is a super-2 number, since 2×1220725019² = 2980339144025100722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1220724982 and 1220725000.

It is not a weakly prime, because it can be changed into another prime (1220725039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610362509 + 610362510.

It is an arithmetic number, because the mean of its divisors is an integer number (610362510).

Almost surely, 2^1220725019 is an apocalyptic number.

1220725019 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220725019 is an equidigital number, since it uses as much as digits as its factorization.

1220725019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 1220725019 is about 34938.8754684520. The cubic root of 1220725019 is about 1068.7413560898.

The spelling of 1220725019 in words is "one billion, two hundred twenty million, seven hundred twenty-five thousand, nineteen".