1225215142 has 16 divisors (see below), whose sum is σ = 1902209760. Its totient is φ = 591167808.

The previous prime is 1225215011. The next prime is 1225215157. The reversal of 1225215142 is 2415125221.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133423 + ... + 142309.

It is an arithmetic number, because the mean of its divisors is an integer number (118888110).

Almost surely, 2^1225215142 is an apocalyptic number.

1225215142 is a deficient number, since it is larger than the sum of its proper divisors (676994618).

1225215142 is a wasteful number, since it uses less digits than its factorization.

1225215142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11295.

The product of its digits is 1600, while the sum is 25.

The square root of 1225215142 is about 35003.0733222099. The cubic root of 1225215142 is about 1070.0501161492.

The spelling of 1225215142 in words is "one billion, two hundred twenty-five million, two hundred fifteen thousand, one hundred forty-two".