11521630 has 8 divisors (see below), whose sum is σ = 20738952. Its totient is φ = 4608648.

The previous prime is 11521607. The next prime is 11521633. The reversal of 11521630 is 3612511.

11521630 = 1516² + 1517² + ... + 1520².

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 11521598 and 11521607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11521633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 576072 + ... + 576091.

It is an arithmetic number, because the mean of its divisors is an integer number (2592369).

Almost surely, 2^11521630 is an apocalyptic number.

11521630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11521630 is a deficient number, since it is larger than the sum of its proper divisors (9217322).

11521630 is a wasteful number, since it uses less digits than its factorization.

11521630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1152170.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 11521630 is about 3394.3526628799. The cubic root of 11521630 is about 225.8592984341.

The spelling of 11521630 in words is "eleven million, five hundred twenty-one thousand, six hundred thirty".