1242001045 has 16 divisors (see below), whose sum is σ = 1592561520. Its totient is φ = 926567424.

The previous prime is 1242001027. The next prime is 1242001051. The reversal of 1242001045 is 5401002421.

It can be written as a sum of positive squares in 8 ways, for example, as 1129969 + 1240871076 = 1063^2 + 35226^2 .

It is a cyclic number.

It is not a de Polignac number, because 1242001045 - 2⁹ = 1242000533 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57762 + ... + 76291.

It is an arithmetic number, because the mean of its divisors is an integer number (99535095).

Almost surely, 2^1242001045 is an apocalyptic number.

It is an amenable number.

1242001045 is a deficient number, since it is larger than the sum of its proper divisors (350560475).

1242001045 is a wasteful number, since it uses less digits than its factorization.

1242001045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134184.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 1242001045 is about 35242.0351994603. The cubic root of 1242001045 is about 1074.9146627769.

Adding to 1242001045 its reverse (5401002421), we get a palindrome (6643003466).

The spelling of 1242001045 in words is "one billion, two hundred forty-two million, one thousand, forty-five".