1242536 has 8 divisors (see below), whose sum is σ = 2329770. Its totient is φ = 621264.

The previous prime is 1242517. The next prime is 1242569. The reversal of 1242536 is 6352421.

It can be written as a sum of positive squares in only one way, i.e., 649636 + 592900 = 806^2 + 770^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×1242536² = 3087791422592, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77651 + ... + 77666.

2^1242536 is an apocalyptic number.

It is an amenable number.

1242536 is a deficient number, since it is larger than the sum of its proper divisors (1087234).

1242536 is a wasteful number, since it uses less digits than its factorization.

1242536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155323 (or 155319 counting only the distinct ones).

The product of its digits is 1440, while the sum is 23.

The square root of 1242536 is about 1114.6909885704. The cubic root of 1242536 is about 107.5068969795.

Adding to 1242536 its reverse (6352421), we get a palindrome (7594957).

The spelling of 1242536 in words is "one million, two hundred forty-two thousand, five hundred thirty-six".