1242015 has 16 divisors (see below), whose sum is σ = 2052096. Its totient is φ = 640800.

The previous prime is 1242001. The next prime is 1242029. The reversal of 1242015 is 5102421.

It is an interprime number because it is at equal distance from previous prime (1242001) and next prime (1242029).

It is not a de Polignac number, because 1242015 - 2⁶ = 1241951 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a junction number, because it is equal to n+sod(n) for n = 1241985 and 1242003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 871 + ... + 1800.

It is an arithmetic number, because the mean of its divisors is an integer number (128256).

2^1242015 is an apocalyptic number.

1242015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1242015 is a deficient number, since it is larger than the sum of its proper divisors (810081).

1242015 is a wasteful number, since it uses less digits than its factorization.

1242015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2710.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 1242015 is about 1114.4572670139. The cubic root of 1242015 is about 107.4918688640.

Adding to 1242015 its reverse (5102421), we get a palindrome (6344436).

The spelling of 1242015 in words is "one million, two hundred forty-two thousand, fifteen".