11801506 has 4 divisors (see below), whose sum is σ = 17702262. Its totient is φ = 5900752.

The previous prime is 11801497. The next prime is 11801509. The reversal of 11801506 is 60510811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60510811 = 1301 ⋅46511.

It can be written as a sum of positive squares in only one way, i.e., 11390625 + 410881 = 3375^2 + 641^2 .

It is not an unprimeable number, because it can be changed into a prime (11801509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2950375 + ... + 2950378.

Almost surely, 2^11801506 is an apocalyptic number.

11801506 is a deficient number, since it is larger than the sum of its proper divisors (5900756).

11801506 is an equidigital number, since it uses as much as digits as its factorization.

11801506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5900755.

The product of its (nonzero) digits is 240, while the sum is 22.

The square root of 11801506 is about 3435.3320072447. The cubic root of 11801506 is about 227.6734964430.

The spelling of 11801506 in words is "eleven million, eight hundred one thousand, five hundred six".