1287190 has 16 divisors (see below), whose sum is σ = 2342592. Its totient is φ = 509184.

The previous prime is 1287179. The next prime is 1287197. The reversal of 1287190 is 917821.

It is a super-2 number, since 2×1287190² = 3313716192200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1287197) 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, 307 + ... + 1633.

It is an arithmetic number, because the mean of its divisors is an integer number (146412).

2^1287190 is an apocalyptic number.

1287190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1287190 is a deficient number, since it is larger than the sum of its proper divisors (1055402).

1287190 is a wasteful number, since it uses less digits than its factorization.

1287190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1431.

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 1287190 is about 1134.5439612461. The cubic root of 1287190 is about 108.7796237613.

The spelling of 1287190 in words is "one million, two hundred eighty-seven thousand, one hundred ninety".