1145378505 has 32 divisors (see below), whose sum is σ = 1874689920. Its totient is φ = 596963840.

The previous prime is 1145378497. The next prime is 1145378513. The reversal of 1145378505 is 5058735411.

It is an interprime number because it is at equal distance from previous prime (1145378497) and next prime (1145378513).

It is not a de Polignac number, because 1145378505 - 2³ = 1145378497 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 149365 + ... + 156845.

It is an arithmetic number, because the mean of its divisors is an integer number (58584060).

Almost surely, 2^1145378505 is an apocalyptic number.

1145378505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1145378505 is a deficient number, since it is larger than the sum of its proper divisors (729311415).

1145378505 is a wasteful number, since it uses less digits than its factorization.

1145378505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7721.

The product of its (nonzero) digits is 84000, while the sum is 39.

The square root of 1145378505 is about 33843.4410927731. The cubic root of 1145378505 is about 1046.2842219907.

The spelling of 1145378505 in words is "one billion, one hundred forty-five million, three hundred seventy-eight thousand, five hundred five".