1057780 has 12 divisors (see below), whose sum is σ = 2221380. Its totient is φ = 423104.

The previous prime is 1057753. The next prime is 1057781. The reversal of 1057780 is 877501.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 556516 + 501264 = 746^2 + 708^2 .

It is a super-2 number, since 2×1057780² = 2237797056800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1057781) 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, 26425 + ... + 26464.

It is an arithmetic number, because the mean of its divisors is an integer number (185115).

2^1057780 is an apocalyptic number.

1057780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1057780 is an abundant number, since it is smaller than the sum of its proper divisors (1163600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1057780 is a wasteful number, since it uses less digits than its factorization.

1057780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52898 (or 52896 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 28.

The square root of 1057780 is about 1028.4843217084. The cubic root of 1057780 is about 101.8900519745.

The spelling of 1057780 in words is "one million, fifty-seven thousand, seven hundred eighty".