1145401405 has 4 divisors (see below), whose sum is σ = 1374481692. Its totient is φ = 916321120.

The previous prime is 1145401399. The next prime is 1145401409. The reversal of 1145401405 is 5041045411.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 736633881 + 408767524 = 27141^2 + 20218^2 .

It is not a de Polignac number, because 1145401405 - 2⁵ = 1145401373 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1145401405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145401409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114540136 + ... + 114540145.

It is an arithmetic number, because the mean of its divisors is an integer number (343620423).

Almost surely, 2^1145401405 is an apocalyptic number.

It is an amenable number.

1145401405 is a deficient number, since it is larger than the sum of its proper divisors (229080287).

1145401405 is an equidigital number, since it uses as much as digits as its factorization.

1145401405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229080286.

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 1145401405 is about 33843.7794136530. The cubic root of 1145401405 is about 1046.2911948673.

Adding to 1145401405 its reverse (5041045411), we get a palindrome (6186446816).

The spelling of 1145401405 in words is "one billion, one hundred forty-five million, four hundred one thousand, four hundred five".