1012231405 has 8 divisors (see below), whose sum is σ = 1219064472. Its totient is φ = 806860608.

The previous prime is 1012231387. The next prime is 1012231421. The reversal of 1012231405 is 5041322101.

It can be written as a sum of positive squares in 4 ways, for example, as 59768361 + 952463044 = 7731^2 + 30862^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1012231405 - 2⁹ = 1012230893 is a prime.

It is a super-2 number, since 2×1012231405² = 2049224834536548050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 364042 + ... + 366811.

It is an arithmetic number, because the mean of its divisors is an integer number (152383059).

Almost surely, 2^1012231405 is an apocalyptic number.

It is an amenable number.

1012231405 is a deficient number, since it is larger than the sum of its proper divisors (206833067).

1012231405 is an equidigital number, since it uses as much as digits as its factorization.

1012231405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 731135.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1012231405 is about 31815.5843102087. The cubic root of 1012231405 is about 1004.0606240145.

Adding to 1012231405 its reverse (5041322101), we get a palindrome (6053553506).

The spelling of 1012231405 in words is "one billion, twelve million, two hundred thirty-one thousand, four hundred five".