1142640402 has 8 divisors (see below), whose sum is σ = 2285280816. Its totient is φ = 380880132.

The previous prime is 1142640379. The next prime is 1142640407. The reversal of 1142640402 is 2040462411.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

1142640402 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (1142640407) 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, 95220028 + ... + 95220039.

It is an arithmetic number, because the mean of its divisors is an integer number (285660102).

Almost surely, 2^1142640402 is an apocalyptic number.

1142640402 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1142640402 is a wasteful number, since it uses less digits than its factorization.

1142640402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190440072.

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 1142640402 is about 33802.9643966324. The cubic root of 1142640402 is about 1045.4498195495.

The spelling of 1142640402 in words is "one billion, one hundred forty-two million, six hundred forty thousand, four hundred two".