1226157 has 4 divisors (see below), whose sum is σ = 1634880. Its totient is φ = 817436.

The previous prime is 1226117. The next prime is 1226179. The reversal of 1226157 is 7516221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7516221 = 3 ⋅2505407.

It is a cyclic number.

It is not a de Polignac number, because 1226157 - 2¹¹ = 1224109 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1226117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 204357 + ... + 204362.

It is an arithmetic number, because the mean of its divisors is an integer number (408720).

2^1226157 is an apocalyptic number.

It is an amenable number.

1226157 is a deficient number, since it is larger than the sum of its proper divisors (408723).

1226157 is an equidigital number, since it uses as much as digits as its factorization.

1226157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408722.

The product of its digits is 840, while the sum is 24.

The square root of 1226157 is about 1107.3197370227. The cubic root of 1226157 is about 107.0324238652.

Subtracting 1226157 from its reverse (7516221), we obtain a square (6290064 = 2508²).

The spelling of 1226157 in words is "one million, two hundred twenty-six thousand, one hundred fifty-seven".