1220757 has 8 divisors (see below), whose sum is σ = 1639200. Its totient is φ = 808080.

The previous prime is 1220743. The next prime is 1220761. The reversal of 1220757 is 7570221.

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

It is not a de Polignac number, because 1220757 - 2¹¹ = 1218709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220717) 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, 919 + ... + 1812.

It is an arithmetic number, because the mean of its divisors is an integer number (204900).

2^1220757 is an apocalyptic number.

It is an amenable number.

1220757 is a deficient number, since it is larger than the sum of its proper divisors (418443).

1220757 is a wasteful number, since it uses less digits than its factorization.

1220757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2883.

The product of its (nonzero) digits is 980, while the sum is 24.

The square root of 1220757 is about 1104.8787263768. The cubic root of 1220757 is about 106.8750689100.

Adding to 1220757 its reverse (7570221), we get a palindrome (8790978).

The spelling of 1220757 in words is "one million, two hundred twenty thousand, seven hundred fifty-seven".