1142640403 has 4 divisors (see below), whose sum is σ = 1143565360. Its totient is φ = 1141715448.

The previous prime is 1142640379. The next prime is 1142640407. The reversal of 1142640403 is 3040462411.

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

It is a cyclic number.

It is not a de Polignac number, because 1142640403 - 2¹⁷ = 1142509331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1142640407) 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, 460623 + ... + 463096.

It is an arithmetic number, because the mean of its divisors is an integer number (285891340).

Almost surely, 2^1142640403 is an apocalyptic number.

1142640403 is a deficient number, since it is larger than the sum of its proper divisors (924957).

1142640403 is an equidigital number, since it uses as much as digits as its factorization.

1142640403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 924956.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 1142640403 is about 33802.9644114240. The cubic root of 1142640403 is about 1045.4498198544.

The spelling of 1142640403 in words is "one billion, one hundred forty-two million, six hundred forty thousand, four hundred three".