1249767945 has 48 divisors (see below), whose sum is σ = 2290788864. Its totient is φ = 629280000.

The previous prime is 1249767943. The next prime is 1249767947. The reversal of 1249767945 is 5497679421.

1249767945 is a `hidden beast` number, since 1 + 2 + 497 + 67 + 94 + 5 = 666.

1249767945 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1249767943) and next prime (1249767947).

It is not a de Polignac number, because 1249767945 - 2¹ = 1249767943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1249767891 and 1249767900.

It is not an unprimeable number, because it can be changed into a prime (1249767943) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 46270 + ... + 68120.

It is an arithmetic number, because the mean of its divisors is an integer number (47724768).

Almost surely, 2^1249767945 is an apocalyptic number.

1249767945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1249767945 is a deficient number, since it is larger than the sum of its proper divisors (1041020919).

1249767945 is a wasteful number, since it uses less digits than its factorization.

1249767945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21934 (or 21931 counting only the distinct ones).

The product of its digits is 3810240, while the sum is 54.

The square root of 1249767945 is about 35352.0571537216. The cubic root of 1249767945 is about 1077.1506812449.

The spelling of 1249767945 in words is "one billion, two hundred forty-nine million, seven hundred sixty-seven thousand, nine hundred forty-five".