1242725 has 12 divisors (see below), whose sum is σ = 1681440. Its totient is φ = 903600.

The previous prime is 1242643. The next prime is 1242739. The reversal of 1242725 is 5272421.

It is a happy number.

It is not a de Polignac number, because 1242725 - 2¹⁴ = 1226341 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1242725.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1985 + ... + 2534.

It is an arithmetic number, because the mean of its divisors is an integer number (140120).

2^1242725 is an apocalyptic number.

It is an amenable number.

1242725 is a deficient number, since it is larger than the sum of its proper divisors (438715).

1242725 is a wasteful number, since it uses less digits than its factorization.

1242725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4540 (or 4535 counting only the distinct ones).

The product of its digits is 1120, while the sum is 23.

The square root of 1242725 is about 1114.7757622051. The cubic root of 1242725 is about 107.5123475992.

The spelling of 1242725 in words is "one million, two hundred forty-two thousand, seven hundred twenty-five".