1506989 has 4 divisors (see below), whose sum is σ = 1644000. Its totient is φ = 1369980.

The previous prime is 1506979. The next prime is 1506997. The reversal of 1506989 is 9896051.

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.

It is a cyclic number.

It is not a de Polignac number, because 1506989 - 2⁸ = 1506733 is a prime.

It is a super-2 number, since 2×1506989² = 4542031692242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1506929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68489 + ... + 68510.

It is an arithmetic number, because the mean of its divisors is an integer number (411000).

2^1506989 is an apocalyptic number.

It is an amenable number.

1506989 is a deficient number, since it is larger than the sum of its proper divisors (137011).

1506989 is a wasteful number, since it uses less digits than its factorization.

1506989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137010.

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 1506989 is about 1227.5948028564. The cubic root of 1506989 is about 114.6489356861.

The spelling of 1506989 in words is "one million, five hundred six thousand, nine hundred eighty-nine".