1020430402 has 4 divisors (see below), whose sum is σ = 1530645606. Its totient is φ = 510215200.

The previous prime is 1020430381. The next prime is 1020430421. The reversal of 1020430402 is 2040340201.

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

It can be written as a sum of positive squares in only one way, i.e., 537266041 + 483164361 = 23179^2 + 21981^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255107599 + ... + 255107602.

Almost surely, 2^1020430402 is an apocalyptic number.

1020430402 is a deficient number, since it is larger than the sum of its proper divisors (510215204).

1020430402 is an equidigital number, since it uses as much as digits as its factorization.

1020430402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510215203.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 1020430402 is about 31944.1763393580. The cubic root of 1020430402 is about 1006.7642754107.

Adding to 1020430402 its reverse (2040340201), we get a palindrome (3060770603).

The spelling of 1020430402 in words is "one billion, twenty million, four hundred thirty thousand, four hundred two".