1215542 has 8 divisors (see below), whose sum is σ = 1836000. Its totient is φ = 603544.

The previous prime is 1215521. The next prime is 1215553. The reversal of 1215542 is 2455121.

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

It is a super-3 number, since 3×1215542³ = 5388044363337000264, which contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1742 + ... + 2337.

It is an arithmetic number, because the mean of its divisors is an integer number (229500).

2^1215542 is an apocalyptic number.

1215542 is a deficient number, since it is larger than the sum of its proper divisors (620458).

1215542 is a wasteful number, since it uses less digits than its factorization.

1215542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4230.

The product of its digits is 400, while the sum is 20.

The square root of 1215542 is about 1102.5162130327. The cubic root of 1215542 is about 106.7226637403.

The spelling of 1215542 in words is "one million, two hundred fifteen thousand, five hundred forty-two".