2051465 has 16 divisors (see below), whose sum is σ = 2725968. Its totient is φ = 1472256.

The previous prime is 2051461. The next prime is 2051477. The reversal of 2051465 is 5641502.

It can be written as a sum of positive squares in 8 ways, for example, as 190969 + 1860496 = 437^2 + 1364^2 .

It is a cyclic number.

It is not a de Polignac number, because 2051465 - 2² = 2051461 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2051465.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2051461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1979 + ... + 2831.

It is an arithmetic number, because the mean of its divisors is an integer number (170373).

2^2051465 is an apocalyptic number.

It is an amenable number.

2051465 is a deficient number, since it is larger than the sum of its proper divisors (674503).

2051465 is a wasteful number, since it uses less digits than its factorization.

2051465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 908.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 2051465 is about 1432.2936151502. The cubic root of 2051465 is about 127.0636628756.

Adding to 2051465 its reverse (5641502), we get a palindrome (7692967).

The spelling of 2051465 in words is "two million, fifty-one thousand, four hundred sixty-five".