1021400433 has 12 divisors (see below), whose sum is σ = 1481975040. Its totient is φ = 677878776.

The previous prime is 1021400383. The next prime is 1021400449. The reversal of 1021400433 is 3340041201.

It is not a de Polignac number, because 1021400433 - 2¹⁰ = 1021399409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1021400473) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 252453 + ... + 256466.

It is an arithmetic number, because the mean of its divisors is an integer number (123497920).

Almost surely, 2^1021400433 is an apocalyptic number.

It is an amenable number.

1021400433 is a deficient number, since it is larger than the sum of its proper divisors (460574607).

1021400433 is a wasteful number, since it uses less digits than its factorization.

1021400433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509148 (or 509145 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1021400433 is about 31959.3559540864. The cubic root of 1021400433 is about 1007.0831876611.

Adding to 1021400433 its reverse (3340041201), we get a palindrome (4361441634).

The spelling of 1021400433 in words is "one billion, twenty-one million, four hundred thousand, four hundred thirty-three".