11421684 has 18 divisors (see below), whose sum is σ = 28871570. Its totient is φ = 3807216.

The previous prime is 11421677. The next prime is 11421689. The reversal of 11421684 is 48612411.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 10381284 + 1040400 = 3222^2 + 1020^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11421689) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 158599 + ... + 158670.

Almost surely, 2^11421684 is an apocalyptic number.

It is an amenable number.

11421684 is an abundant number, since it is smaller than the sum of its proper divisors (17449886).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11421684 is a wasteful number, since it uses less digits than its factorization.

11421684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317279 (or 317274 counting only the distinct ones).

The product of its digits is 1536, while the sum is 27.

The square root of 11421684 is about 3379.5982009701. The cubic root of 11421684 is about 225.2043181103.

It can be divided in two parts, 114 and 21684, that multiplied together give a triangular number (2471976 = T₂₂₂₃).

The spelling of 11421684 in words is "eleven million, four hundred twenty-one thousand, six hundred eighty-four".