1264654019 has 2 divisors, whose sum is σ = 1264654020. Its totient is φ = 1264654018.

The previous prime is 1264654009. The next prime is 1264654049. The reversal of 1264654019 is 9104564621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1264654019 - 2¹² = 1264649923 is a prime.

It is a super-2 number, since 2×1264654019² = 3198699575545704722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1264654009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632327009 + 632327010.

It is an arithmetic number, because the mean of its divisors is an integer number (632327010).

Almost surely, 2^1264654019 is an apocalyptic number.

1264654019 is a deficient number, since it is larger than the sum of its proper divisors (1).

1264654019 is an equidigital number, since it uses as much as digits as its factorization.

1264654019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 1264654019 is about 35561.9743405790. The cubic root of 1264654019 is about 1081.4104853437.

The spelling of 1264654019 in words is "one billion, two hundred sixty-four million, six hundred fifty-four thousand, nineteen".