1264545091 has 2 divisors, whose sum is σ = 1264545092. Its totient is φ = 1264545090.

The previous prime is 1264545077. The next prime is 1264545101. The reversal of 1264545091 is 1905454621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1264545091 - 2¹³ = 1264536899 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1264545091.

It is not a weakly prime, because it can be changed into another prime (1264545691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632272545 + 632272546.

It is an arithmetic number, because the mean of its divisors is an integer number (632272546).

Almost surely, 2^1264545091 is an apocalyptic number.

1264545091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1264545091 is an equidigital number, since it uses as much as digits as its factorization.

1264545091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 1264545091 is about 35560.4427840824. The cubic root of 1264545091 is about 1081.3794362025.

The spelling of 1264545091 in words is "one billion, two hundred sixty-four million, five hundred forty-five thousand, ninety-one".