1021040423 has 8 divisors (see below), whose sum is σ = 1099952448. Its totient is φ = 942181344.

The previous prime is 1021040399. The next prime is 1021040431. The reversal of 1021040423 is 3240401201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1021040423 - 2¹⁶ = 1020974887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021040443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32765 + ... + 55817.

It is an arithmetic number, because the mean of its divisors is an integer number (137494056).

Almost surely, 2^1021040423 is an apocalyptic number.

1021040423 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1021040423 is a deficient number, since it is larger than the sum of its proper divisors (78912025).

1021040423 is a wasteful number, since it uses less digits than its factorization.

1021040423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26473.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1021040423 is about 31953.7231477022. The cubic root of 1021040423 is about 1006.9648525427.

Adding to 1021040423 its reverse (3240401201), we get a palindrome (4261441624).

The spelling of 1021040423 in words is "one billion, twenty-one million, forty thousand, four hundred twenty-three".