11902147 has 4 divisors (see below), whose sum is σ = 11911536. Its totient is φ = 11892760.

The previous prime is 11902133. The next prime is 11902183. The reversal of 11902147 is 74120911.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 74120911 = 1277 ⋅58043.

It is a cyclic number.

It is not a de Polignac number, because 11902147 - 2⁷ = 11902019 is a prime.

It is a super-2 number, since 2×11902147² = 283322206419218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11902127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2428 + ... + 5449.

It is an arithmetic number, because the mean of its divisors is an integer number (2977884).

Almost surely, 2^11902147 is an apocalyptic number.

11902147 is a deficient number, since it is larger than the sum of its proper divisors (9389).

11902147 is an equidigital number, since it uses as much as digits as its factorization.

11902147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9388.

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 11902147 is about 3449.9488402004. The cubic root of 11902147 is about 228.3188508524.

It can be divided in two parts, 1190 and 2147, that multiplied together give a triangular number (2554930 = T₂₂₆₀).

The spelling of 11902147 in words is "eleven million, nine hundred two thousand, one hundred forty-seven".