1240221404 has 6 divisors (see below), whose sum is σ = 2170387464. Its totient is φ = 620110700.

The previous prime is 1240221403. The next prime is 1240221457. The reversal of 1240221404 is 4041220421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240221403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155027672 + ... + 155027679.

It is an arithmetic number, because the mean of its divisors is an integer number (361731244).

Almost surely, 2^1240221404 is an apocalyptic number.

It is an amenable number.

1240221404 is a deficient number, since it is larger than the sum of its proper divisors (930166060).

1240221404 is a wasteful number, since it uses less digits than its factorization.

1240221404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310055355 (or 310055353 counting only the distinct ones).

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

The square root of 1240221404 is about 35216.7773085500. Note that the first 3 decimals coincide. The cubic root of 1240221404 is about 1074.4010087227.

Adding to 1240221404 its reverse (4041220421), we get a palindrome (5281441825).

The spelling of 1240221404 in words is "one billion, two hundred forty million, two hundred twenty-one thousand, four hundred four".