1213930 has 16 divisors (see below), whose sum is σ = 2198664. Its totient is φ = 482560.

The previous prime is 1213921. The next prime is 1213931. The reversal of 1213930 is 393121.

It can be written as a sum of positive squares in 4 ways, for example, as 670761 + 543169 = 819^2 + 737^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1213898 and 1213907.

It is not an unprimeable number, because it can be changed into a prime (1213931) 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, 2070 + ... + 2590.

2^1213930 is an apocalyptic number.

1213930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1213930 is a deficient number, since it is larger than the sum of its proper divisors (984734).

1213930 is a wasteful number, since it uses less digits than its factorization.

1213930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 761.

The product of its (nonzero) digits is 162, while the sum is 19.

The square root of 1213930 is about 1101.7849154894. The cubic root of 1213930 is about 106.6754658540.

The spelling of 1213930 in words is "one million, two hundred thirteen thousand, nine hundred thirty".