1225679 has 8 divisors (see below), whose sum is σ = 1508640. Its totient is φ = 969696.

The previous prime is 1225663. The next prime is 1225687. The reversal of 1225679 is 9765221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1225679 - 2⁴ = 1225663 is a prime.

It is a super-2 number, since 2×1225679² = 3004578022082, which contains 22 as substring.

It is an Ulam number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6644 + ... + 6825.

It is an arithmetic number, because the mean of its divisors is an integer number (188580).

2^1225679 is an apocalyptic number.

1225679 is a deficient number, since it is larger than the sum of its proper divisors (282961).

1225679 is a wasteful number, since it uses less digits than its factorization.

1225679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13489.

The product of its digits is 7560, while the sum is 32.

The square root of 1225679 is about 1107.1038794982. The cubic root of 1225679 is about 107.0185136975.

The spelling of 1225679 in words is "one million, two hundred twenty-five thousand, six hundred seventy-nine".