2126649 has 48 divisors (see below), whose sum is σ = 3742848. Its totient is φ = 1064448.

The previous prime is 2126639. The next prime is 2126659. The reversal of 2126649 is 9466212.

It is an interprime number because it is at equal distance from previous prime (2126639) and next prime (2126659).

It is not a de Polignac number, because 2126649 - 2⁴ = 2126633 is a prime.

It is an Ulam number.

2126649 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2126639) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 57459 + ... + 57495.

It is an arithmetic number, because the mean of its divisors is an integer number (77976).

2^2126649 is an apocalyptic number.

It is an amenable number.

2126649 is a deficient number, since it is larger than the sum of its proper divisors (1616199).

2126649 is a wasteful number, since it uses less digits than its factorization.

2126649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94 (or 87 counting only the distinct ones).

The product of its digits is 5184, while the sum is 30.

The square root of 2126649 is about 1458.3034663608. The cubic root of 2126649 is about 128.5973261765.

It can be divided in two parts, 2126 and 649, that added together give a triangular number (2775 = T₇₄).

The spelling of 2126649 in words is "two million, one hundred twenty-six thousand, six hundred forty-nine".