1240221445 has 4 divisors (see below), whose sum is σ = 1488265740. Its totient is φ = 992177152.

The previous prime is 1240221403. The next prime is 1240221457. The reversal of 1240221445 is 5441220421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 700449156 + 539772289 = 26466^2 + 23233^2 .

It is a cyclic number.

It is not a de Polignac number, because 1240221445 - 2¹¹ = 1240219397 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124022140 + ... + 124022149.

It is an arithmetic number, because the mean of its divisors is an integer number (372066435).

Almost surely, 2^1240221445 is an apocalyptic number.

It is an amenable number.

1240221445 is a deficient number, since it is larger than the sum of its proper divisors (248044295).

1240221445 is an equidigital number, since it uses as much as digits as its factorization.

1240221445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248044294.

The product of its (nonzero) digits is 2560, while the sum is 25.

The square root of 1240221445 is about 35216.7778906589. Note that the first 3 decimals coincide. The cubic root of 1240221445 is about 1074.4010205621.

Adding to 1240221445 its reverse (5441220421), we get a palindrome (6681441866).

The spelling of 1240221445 in words is "one billion, two hundred forty million, two hundred twenty-one thousand, four hundred forty-five".