1651049 has 4 divisors (see below), whose sum is σ = 1654740. Its totient is φ = 1647360.

The previous prime is 1651033. The next prime is 1651073. The reversal of 1651049 is 9401561.

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 937024 + 714025 = 968^2 + 845^2 .

It is a cyclic number.

It is not a de Polignac number, because 1651049 - 2⁴ = 1651033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1651019) 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, 1064 + ... + 2105.

It is an arithmetic number, because the mean of its divisors is an integer number (413685).

2^1651049 is an apocalyptic number.

It is an amenable number.

1651049 is a deficient number, since it is larger than the sum of its proper divisors (3691).

1651049 is an equidigital number, since it uses as much as digits as its factorization.

1651049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3690.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 1651049 is about 1284.9315156848. The cubic root of 1651049 is about 118.1916115069.

The spelling of 1651049 in words is "one million, six hundred fifty-one thousand, forty-nine".