1005401402 has 4 divisors (see below), whose sum is σ = 1508102106. Its totient is φ = 502700700.

The previous prime is 1005401389. The next prime is 1005401413. The reversal of 1005401402 is 2041045001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2041045001 = 23 ⋅88741087.

It can be written as a sum of positive squares in only one way, i.e., 837465721 + 167935681 = 28939^2 + 12959^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 251350349 + ... + 251350352.

Almost surely, 2^1005401402 is an apocalyptic number.

1005401402 is a deficient number, since it is larger than the sum of its proper divisors (502700704).

1005401402 is an equidigital number, since it uses as much as digits as its factorization.

1005401402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502700703.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 1005401402 is about 31708.0652516044. The cubic root of 1005401402 is about 1001.7972353434.

Adding to 1005401402 its reverse (2041045001), we get a palindrome (3046446403).

The spelling of 1005401402 in words is "one billion, five million, four hundred one thousand, four hundred two".