1040421040 has 20 divisors (see below), whose sum is σ = 2418979104. Its totient is φ = 416168384.

The previous prime is 1040421017. The next prime is 1040421049. The reversal of 1040421040 is 401240401.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (1040421049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6502552 + ... + 6502711.

Almost surely, 2^1040421040 is an apocalyptic number.

1040421040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1040421040 is an abundant number, since it is smaller than the sum of its proper divisors (1378558064).

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

1040421040 is a wasteful number, since it uses less digits than its factorization.

1040421040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13005276 (or 13005270 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 1040421040 is about 32255.5582807057. The cubic root of 1040421040 is about 1013.2961099361.

Adding to 1040421040 its reverse (401240401), we get a palindrome (1441661441).

The spelling of 1040421040 in words is "one billion, forty million, four hundred twenty-one thousand, forty".