11455661 has 12 divisors (see below), whose sum is σ = 13382460. Its totient is φ = 9777600.

The previous prime is 11455657. The next prime is 11455663. The reversal of 11455661 is 16655411.

It can be written as a sum of positive squares in 2 ways, for example, as 6280036 + 5175625 = 2506^2 + 2275^2 .

It is not a de Polignac number, because 11455661 - 2² = 11455657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11455663) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18761 + ... + 19361.

It is an arithmetic number, because the mean of its divisors is an integer number (1115205).

Almost surely, 2^11455661 is an apocalyptic number.

It is an amenable number.

11455661 is a deficient number, since it is larger than the sum of its proper divisors (1926799).

11455661 is an equidigital number, since it uses as much as digits as its factorization.

11455661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1004 (or 997 counting only the distinct ones).

The product of its digits is 3600, while the sum is 29.

The square root of 11455661 is about 3384.6212491208. The cubic root of 11455661 is about 225.4274081610.

The spelling of 11455661 in words is "eleven million, four hundred fifty-five thousand, six hundred sixty-one".