1051890 has 32 divisors (see below), whose sum is σ = 2885760. Its totient is φ = 240384.

The previous prime is 1051889. The next prime is 1051903. The reversal of 1051890 is 981501.

It is a super-2 number, since 2×1051890² = 2212945144200, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1051890.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2295 + ... + 2714.

It is an arithmetic number, because the mean of its divisors is an integer number (90180).

2^1051890 is an apocalyptic number.

1051890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1051890 is an abundant number, since it is smaller than the sum of its proper divisors (1833870).

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

1051890 is a wasteful number, since it uses less digits than its factorization.

1051890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5026.

The product of its (nonzero) digits is 360, while the sum is 24.

The square root of 1051890 is about 1025.6168875365. The cubic root of 1051890 is about 101.7005829092.

The spelling of 1051890 in words is "one million, fifty-one thousand, eight hundred ninety".