1400090 has 8 divisors (see below), whose sum is σ = 2520180. Its totient is φ = 560032.

The previous prime is 1400081. The next prime is 1400093. The reversal of 1400090 is 900041.

It can be written as a sum of positive squares in 2 ways, for example, as 1394761 + 5329 = 1181^2 + 73^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1400093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69995 + ... + 70014.

2^1400090 is an apocalyptic number.

1400090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1400090 is a deficient number, since it is larger than the sum of its proper divisors (1120090).

1400090 is a wasteful number, since it uses less digits than its factorization.

1400090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140016.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1400090 is about 1183.2539879502. The cubic root of 1400090 is about 111.8712913474.

The spelling of 1400090 in words is "one million, four hundred thousand, ninety".