11261649 has 16 divisors (see below), whose sum is σ = 17715200. Its totient is φ = 6227280.

The previous prime is 11261629. The next prime is 11261659. The reversal of 11261649 is 94616211.

It is a happy number.

It is not a de Polignac number, because 11261649 - 2⁹ = 11261137 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11261629) 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, 7999 + ... + 9300.

It is an arithmetic number, because the mean of its divisors is an integer number (1107200).

Almost surely, 2^11261649 is an apocalyptic number.

It is an amenable number.

11261649 is a deficient number, since it is larger than the sum of its proper divisors (6453551).

11261649 is a wasteful number, since it uses less digits than its factorization.

11261649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17340.

The product of its digits is 2592, while the sum is 30.

The square root of 11261649 is about 3355.8380473438. The cubic root of 11261649 is about 224.1475497364.

It can be divided in two parts, 1126 and 1649, that added together give a triangular number (2775 = T₇₄).

The spelling of 11261649 in words is "eleven million, two hundred sixty-one thousand, six hundred forty-nine".