1402661 has 4 divisors (see below), whose sum is σ = 1510572. Its totient is φ = 1294752.

The previous prime is 1402603. The next prime is 1402673. The reversal of 1402661 is 1662041.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 390625 + 1012036 = 625^2 + 1006^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1402661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1402061) 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, 53936 + ... + 53961.

It is an arithmetic number, because the mean of its divisors is an integer number (377643).

2^1402661 is an apocalyptic number.

It is an amenable number.

1402661 is a deficient number, since it is larger than the sum of its proper divisors (107911).

1402661 is a wasteful number, since it uses less digits than its factorization.

1402661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107910.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1402661 is about 1184.3399005353. The cubic root of 1402661 is about 111.9397262850.

The spelling of 1402661 in words is "one million, four hundred two thousand, six hundred sixty-one".