1225157 has 2 divisors, whose sum is σ = 1225158. Its totient is φ = 1225156.

The previous prime is 1225153. The next prime is 1225183. The reversal of 1225157 is 7515221.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 638401 + 586756 = 799^2 + 766^2 .

It is a cyclic number.

It is not a de Polignac number, because 1225157 - 2² = 1225153 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1225153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612578 + 612579.

It is an arithmetic number, because the mean of its divisors is an integer number (612579).

2^1225157 is an apocalyptic number.

It is an amenable number.

1225157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225157 is an equidigital number, since it uses as much as digits as its factorization.

1225157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 700, while the sum is 23.

The square root of 1225157 is about 1106.8681041569. The cubic root of 1225157 is about 107.0033189642.

Subtracting 1225157 from its reverse (7515221), we obtain a square (6290064 = 2508²).

The spelling of 1225157 in words is "one million, two hundred twenty-five thousand, one hundred fifty-seven".