1240202045 has 8 divisors (see below), whose sum is σ = 1496465880. Its totient is φ = 986679360.

The previous prime is 1240202017. The next prime is 1240202053. The reversal of 1240202045 is 5402020421.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 82773604 + 1157428441 = 9098^2 + 34021^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1240202045 - 2¹⁶ = 1240136509 is a prime.

It is a super-2 number, since 2×1240202045² = 3076202224844364050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 684290 + ... + 686099.

It is an arithmetic number, because the mean of its divisors is an integer number (187058235).

Almost surely, 2^1240202045 is an apocalyptic number.

It is an amenable number.

1240202045 is a deficient number, since it is larger than the sum of its proper divisors (256263835).

1240202045 is a wasteful number, since it uses less digits than its factorization.

1240202045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1370575.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 1240202045 is about 35216.5024526854. The cubic root of 1240202045 is about 1074.3954184742.

Adding to 1240202045 its reverse (5402020421), we get a palindrome (6642222466).

The spelling of 1240202045 in words is "one billion, two hundred forty million, two hundred two thousand, forty-five".