1071890 has 16 divisors (see below), whose sum is σ = 1982232. Its totient is φ = 417024.

The previous prime is 1071871. The next prime is 1071899. The reversal of 1071890 is 981701.

It can be written as a sum of positive squares in 4 ways, for example, as 863041 + 208849 = 929^2 + 457^2 .

It is a super-2 number, since 2×1071890² = 2297896344200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1071899) 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, 1079 + ... + 1818.

2^1071890 is an apocalyptic number.

1071890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1071890 is a deficient number, since it is larger than the sum of its proper divisors (910342).

1071890 is a wasteful number, since it uses less digits than its factorization.

1071890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2941.

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

The square root of 1071890 is about 1035.3212061964. The cubic root of 1071890 is about 102.3410982259.

The spelling of 1071890 in words is "one million, seventy-one thousand, eight hundred ninety".