1242730 has 16 divisors (see below), whose sum is σ = 2254464. Its totient is φ = 493200.

The previous prime is 1242643. The next prime is 1242739. The reversal of 1242730 is 372421.

It is a junction number, because it is equal to n+sod(n) for n = 1242698 and 1242707.

It is not an unprimeable number, because it can be changed into a prime (1242739) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1099 + ... + 1921.

It is an arithmetic number, because the mean of its divisors is an integer number (140904).

2^1242730 is an apocalyptic number.

1242730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1242730 is a deficient number, since it is larger than the sum of its proper divisors (1011734).

1242730 is a wasteful number, since it uses less digits than its factorization.

1242730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 981.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 1242730 is about 1114.7780048063. The cubic root of 1242730 is about 107.5124917880.

The spelling of 1242730 in words is "one million, two hundred forty-two thousand, seven hundred thirty".