11751321 has 16 divisors (see below), whose sum is σ = 16580736. Its totient is φ = 7387776.

The previous prime is 11751277. The next prime is 11751343. The reversal of 11751321 is 12315711.

11751321 = T₃₂₆ + T₃₂₇ + ... + T₄₇₁.

It is a happy number.

It is not a de Polignac number, because 11751321 - 2⁷ = 11751193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11751361) 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, 3871 + ... + 6203.

It is an arithmetic number, because the mean of its divisors is an integer number (1036296).

Almost surely, 2^11751321 is an apocalyptic number.

It is an amenable number.

11751321 is a deficient number, since it is larger than the sum of its proper divisors (4829415).

11751321 is a wasteful number, since it uses less digits than its factorization.

11751321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2432.

The product of its digits is 210, while the sum is 21.

The square root of 11751321 is about 3428.0199824388. The cubic root of 11751321 is about 227.3503165437.

The spelling of 11751321 in words is "eleven million, seven hundred fifty-one thousand, three hundred twenty-one".