1402090 has 16 divisors (see below), whose sum is σ = 2543400. Its totient is φ = 556480.

The previous prime is 1402087. The next prime is 1402123. The reversal of 1402090 is 902041.

It can be written as a sum of positive squares in 4 ways, for example, as 927369 + 474721 = 963^2 + 689^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1020 + ... + 1960.

2^1402090 is an apocalyptic number.

1402090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1402090 is a deficient number, since it is larger than the sum of its proper divisors (1141310).

1402090 is a wasteful number, since it uses less digits than its factorization.

1402090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1097.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1402090 is about 1184.0988134442. The cubic root of 1402090 is about 111.9245346222.

The spelling of 1402090 in words is "one million, four hundred two thousand, ninety".