1145781937 has 4 divisors (see below), whose sum is σ = 1154528496. Its totient is φ = 1137035380.

The previous prime is 1145781911. The next prime is 1145781977. The reversal of 1145781937 is 7391875411.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7391875411 = 239 ⋅30928349.

It is a cyclic number.

It is not a de Polignac number, because 1145781937 - 2²³ = 1137393329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1145781977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4373083 + ... + 4373344.

It is an arithmetic number, because the mean of its divisors is an integer number (288632124).

Almost surely, 2^1145781937 is an apocalyptic number.

It is an amenable number.

1145781937 is a deficient number, since it is larger than the sum of its proper divisors (8746559).

1145781937 is an equidigital number, since it uses as much as digits as its factorization.

1145781937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8746558.

The product of its digits is 211680, while the sum is 46.

The square root of 1145781937 is about 33849.4008366470. The cubic root of 1145781937 is about 1046.4070503790.

The spelling of 1145781937 in words is "one billion, one hundred forty-five million, seven hundred eighty-one thousand, nine hundred thirty-seven".