1020401403 has 16 divisors (see below), whose sum is σ = 1636734720. Its totient is φ = 552397536.

The previous prime is 1020401383. The next prime is 1020401407. The reversal of 1020401403 is 3041040201.

It is not a de Polignac number, because 1020401403 - 2⁸ = 1020401147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1020401407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1278300 + ... + 1279097.

It is an arithmetic number, because the mean of its divisors is an integer number (102295920).

Almost surely, 2^1020401403 is an apocalyptic number.

1020401403 is a deficient number, since it is larger than the sum of its proper divisors (616333317).

1020401403 is a wasteful number, since it uses less digits than its factorization.

1020401403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2557426.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 1020401403 is about 31943.7224349323. The cubic root of 1020401403 is about 1006.7547384436.

Adding to 1020401403 its reverse (3041040201), we get a palindrome (4061441604).

The spelling of 1020401403 in words is "one billion, twenty million, four hundred one thousand, four hundred three".