1042135405 has 16 divisors (see below), whose sum is σ = 1306767744. Its totient is φ = 796340160.

The previous prime is 1042135397. The next prime is 1042135433. The reversal of 1042135405 is 5045312401.

It is a happy number.

It is not a de Polignac number, because 1042135405 - 2³ = 1042135397 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1042135405.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81070 + ... + 93040.

It is an arithmetic number, because the mean of its divisors is an integer number (81672984).

Almost surely, 2^1042135405 is an apocalyptic number.

It is an amenable number.

1042135405 is a deficient number, since it is larger than the sum of its proper divisors (264632339).

1042135405 is a wasteful number, since it uses less digits than its factorization.

1042135405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12756.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1042135405 is about 32282.1220646970. The cubic root of 1042135405 is about 1013.8523610596.

Adding to 1042135405 its reverse (5045312401), we get a palindrome (6087447806).

The spelling of 1042135405 in words is "one billion, forty-two million, one hundred thirty-five thousand, four hundred five".