1042212440 has 32 divisors (see below), whose sum is σ = 2425842000. Its totient is φ = 402509184.

The previous prime is 1042212407. The next prime is 1042212443. The reversal of 1042212440 is 442122401.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1042212443) 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, 448070 + ... + 450389.

Almost surely, 2^1042212440 is an apocalyptic number.

1042212440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1042212440 is an abundant number, since it is smaller than the sum of its proper divisors (1383629560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1042212440 is a wasteful number, since it uses less digits than its factorization.

1042212440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 898499 (or 898495 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 1042212440 is about 32283.3151953141. The cubic root of 1042212440 is about 1013.8773418800.

Adding to 1042212440 its reverse (442122401), we get a palindrome (1484334841).

The spelling of 1042212440 in words is "one billion, forty-two million, two hundred twelve thousand, four hundred forty".