1021061431 has 8 divisors (see below), whose sum is σ = 1103190704. Its totient is φ = 939444480.

The previous prime is 1021061413. The next prime is 1021061443. The reversal of 1021061431 is 1341601201.

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

It is not a de Polignac number, because 1021061431 - 2¹⁵ = 1021028663 is a prime.

It is a super-2 number, since 2×1021061431² = 2085132891751535522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1021061399 and 1021061408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021061131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123930 + ... + 131911.

It is an arithmetic number, because the mean of its divisors is an integer number (137898838).

Almost surely, 2^1021061431 is an apocalyptic number.

1021061431 is a deficient number, since it is larger than the sum of its proper divisors (82129273).

1021061431 is a wasteful number, since it uses less digits than its factorization.

1021061431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256161.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 1021061431 is about 31954.0518713981. The cubic root of 1021061431 is about 1006.9717586266.

Adding to 1021061431 its reverse (1341601201), we get a palindrome (2362662632).

The spelling of 1021061431 in words is "one billion, twenty-one million, sixty-one thousand, four hundred thirty-one".