1225690 has 16 divisors (see below), whose sum is σ = 2322720. Its totient is φ = 464400.

The previous prime is 1225687. The next prime is 1225691. The reversal of 1225690 is 965221.

It is a super-2 number, since 2×1225690² = 3004631952200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1225691) 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, 3036 + ... + 3415.

It is an arithmetic number, because the mean of its divisors is an integer number (145170).

2^1225690 is an apocalyptic number.

1225690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1225690 is a deficient number, since it is larger than the sum of its proper divisors (1097030).

1225690 is a wasteful number, since it uses less digits than its factorization.

1225690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6477.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 1225690 is about 1107.1088474039. The cubic root of 1225690 is about 107.0188338466.

The spelling of 1225690 in words is "one million, two hundred twenty-five thousand, six hundred ninety".