1502661 has 4 divisors (see below), whose sum is σ = 2003552. Its totient is φ = 1001772.

The previous prime is 1502651. The next prime is 1502687. The reversal of 1502661 is 1662051.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1662051 = 3 ⋅554017.

It is not a de Polignac number, because 1502661 - 2⁵ = 1502629 is a prime.

It is a D-number.

It is a Duffinian number.

1502661 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1502621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 250441 + ... + 250446.

It is an arithmetic number, because the mean of its divisors is an integer number (500888).

2^1502661 is an apocalyptic number.

It is an amenable number.

1502661 is a deficient number, since it is larger than the sum of its proper divisors (500891).

1502661 is an equidigital number, since it uses as much as digits as its factorization.

1502661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500890.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 1502661 is about 1225.8307387237. The cubic root of 1502661 is about 114.5390750358.

The spelling of 1502661 in words is "one million, five hundred two thousand, six hundred sixty-one".