1264542049 has 16 divisors (see below), whose sum is σ = 1344430080. Its totient is φ = 1187424000.

The previous prime is 1264542043. The next prime is 1264542137. The reversal of 1264542049 is 9402454621.

It is a de Polignac number, because none of the positive numbers 2^k-1264542049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1264541999 and 1264542017.

It is not an unprimeable number, because it can be changed into a prime (1264542043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 240157 + ... + 245365.

It is an arithmetic number, because the mean of its divisors is an integer number (84026880).

Almost surely, 2^1264542049 is an apocalyptic number.

It is an amenable number.

1264542049 is a deficient number, since it is larger than the sum of its proper divisors (79888031).

1264542049 is a wasteful number, since it uses less digits than its factorization.

1264542049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5472.

The product of its (nonzero) digits is 69120, while the sum is 37.

The square root of 1264542049 is about 35560.4000118109. The cubic root of 1264542049 is about 1081.3785690767.

The spelling of 1264542049 in words is "one billion, two hundred sixty-four million, five hundred forty-two thousand, forty-nine".