1242455211 has 6 divisors (see below), whose sum is σ = 1794657540. Its totient is φ = 828303468.

The previous prime is 1242455209. The next prime is 1242455213. The reversal of 1242455211 is 1125542421.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1242455209) and next prime (1242455213).

It is not a de Polignac number, because 1242455211 - 2¹ = 1242455209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1242455213) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 69025281 + ... + 69025298.

It is an arithmetic number, because the mean of its divisors is an integer number (299109590).

Almost surely, 2^1242455211 is an apocalyptic number.

1242455211 is a deficient number, since it is larger than the sum of its proper divisors (552202329).

1242455211 is a wasteful number, since it uses less digits than its factorization.

1242455211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138050585 (or 138050582 counting only the distinct ones).

The product of its digits is 3200, while the sum is 27.

The square root of 1242455211 is about 35248.4781373608. The cubic root of 1242455211 is about 1075.0456691613.

Adding to 1242455211 its reverse (1125542421), we get a palindrome (2367997632).

The spelling of 1242455211 in words is "one billion, two hundred forty-two million, four hundred fifty-five thousand, two hundred eleven".