1242244215 has 32 divisors (see below), whose sum is σ = 2209947840. Its totient is φ = 662076288.

The previous prime is 1242244207. The next prime is 1242244249. The reversal of 1242244215 is 5124422421.

It is a happy number.

1242244215 is a `hidden beast` number, since 12 + 4 + 224 + 421 + 5 = 666.

It is not a de Polignac number, because 1242244215 - 2³ = 1242244207 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 307549 + ... + 311561.

It is an arithmetic number, because the mean of its divisors is an integer number (69060870).

Almost surely, 2^1242244215 is an apocalyptic number.

1242244215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1242244215 is a deficient number, since it is larger than the sum of its proper divisors (967703625).

1242244215 is a wasteful number, since it uses less digits than its factorization.

1242244215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6320 (or 6314 counting only the distinct ones).

The product of its digits is 5120, while the sum is 27.

The square root of 1242244215 is about 35245.4850300007. The cubic root of 1242244215 is about 1074.9848103136.

Adding to 1242244215 its reverse (5124422421), we get a palindrome (6366666636).

The spelling of 1242244215 in words is "one billion, two hundred forty-two million, two hundred forty-four thousand, two hundred fifteen".