11280501 has 12 divisors (see below), whose sum is σ = 16360812. Its totient is φ = 7489536.

The previous prime is 11280473. The next prime is 11280527. The reversal of 11280501 is 10508211.

It can be written as a sum of positive squares in 2 ways, for example, as 7986276 + 3294225 = 2826^2 + 1815^2 .

It is not a de Polignac number, because 11280501 - 2²³ = 2891893 is a prime.

It is a super-2 number, since 2×11280501² = 254499405622002, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11280601) 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, 126 + ... + 4751.

It is an arithmetic number, because the mean of its divisors is an integer number (1363401).

Almost surely, 2^11280501 is an apocalyptic number.

It is an amenable number.

11280501 is a deficient number, since it is larger than the sum of its proper divisors (5080311).

11280501 is a wasteful number, since it uses less digits than its factorization.

11280501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5140 (or 5137 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 18.

The square root of 11280501 is about 3358.6457092108. The cubic root of 11280501 is about 224.2725543397.

Adding to 11280501 its reverse (10508211), we get a palindrome (21788712).

It can be divided in two parts, 11280 and 501, that added together give a triangular number (11781 = T₁₅₃).

The spelling of 11280501 in words is "eleven million, two hundred eighty thousand, five hundred one".