1242670 has 48 divisors (see below), whose sum is σ = 2681280. Its totient is φ = 411840.

The previous prime is 1242643. The next prime is 1242739. The reversal of 1242670 is 762421.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15691 + ... + 15769.

It is an arithmetic number, because the mean of its divisors is an integer number (55860).

2^1242670 is an apocalyptic number.

1242670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1242670 is an abundant number, since it is smaller than the sum of its proper divisors (1438610).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1242670 is a wasteful number, since it uses less digits than its factorization.

1242670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121 (or 110 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 1242670 is about 1114.7510932939. The cubic root of 1242670 is about 107.5107614970.

Subtracting from 1242670 its reverse (762421), we obtain a square (480249 = 693²).

The spelling of 1242670 in words is "one million, two hundred forty-two thousand, six hundred seventy".