1024405402 has 4 divisors (see below), whose sum is σ = 1536608106. Its totient is φ = 512202700.

The previous prime is 1024405399. The next prime is 1024405429. The reversal of 1024405402 is 2045044201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2045044201 = 10141 ⋅201661.

It can be written as a sum of positive squares in only one way, i.e., 849081321 + 175324081 = 29139^2 + 13241^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256101349 + ... + 256101352.

Almost surely, 2^1024405402 is an apocalyptic number.

1024405402 is a deficient number, since it is larger than the sum of its proper divisors (512202704).

1024405402 is an equidigital number, since it uses as much as digits as its factorization.

1024405402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512202703.

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 1024405402 is about 32006.3337794256. Note that the first 3 decimals coincide. The cubic root of 1024405402 is about 1008.0698365625.

Adding to 1024405402 its reverse (2045044201), we get a palindrome (3069449603).

The spelling of 1024405402 in words is "one billion, twenty-four million, four hundred five thousand, four hundred two".