1215225542 has 8 divisors (see below), whose sum is σ = 1822992696. Its totient is φ = 607561312.

The previous prime is 1215225511. The next prime is 1215225551. The reversal of 1215225542 is 2455225121.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20153 + ... + 53259.

It is an arithmetic number, because the mean of its divisors is an integer number (227874087).

Almost surely, 2^1215225542 is an apocalyptic number.

1215225542 is a deficient number, since it is larger than the sum of its proper divisors (607767154).

1215225542 is a wasteful number, since it uses less digits than its factorization.

1215225542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51462.

The product of its digits is 8000, while the sum is 29.

The square root of 1215225542 is about 34860.0852265166. The cubic root of 1215225542 is about 1067.1340143260.

The spelling of 1215225542 in words is "one billion, two hundred fifteen million, two hundred twenty-five thousand, five hundred forty-two".