1071980 has 96 divisors (see below), whose sum is σ = 3010560. Its totient is φ = 311040.

The previous prime is 1071979. The next prime is 1071991. The reversal of 1071980 is 891701.

It is a super-2 number, since 2×1071980² = 2298282240800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34565 + ... + 34595.

It is an arithmetic number, because the mean of its divisors is an integer number (31360).

2^1071980 is an apocalyptic number.

1071980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1071980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1505280).

1071980 is an abundant number, since it is smaller than the sum of its proper divisors (1938580).

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

1071980 is a wasteful number, since it uses less digits than its factorization.

1071980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79 (or 77 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 26.

The square root of 1071980 is about 1035.3646700559. The cubic root of 1071980 is about 102.3439624629.

The spelling of 1071980 in words is "one million, seventy-one thousand, nine hundred eighty".