11901512 has 48 divisors (see below), whose sum is σ = 26310060. Its totient is φ = 5031936.

The previous prime is 11901509. The next prime is 11901529. The reversal of 11901512 is 21510911.

It can be written as a sum of positive squares in 2 ways, for example, as 10278436 + 1623076 = 3206^2 + 1274^2 .

It is a super-2 number, since 2×11901512² = 283291975772288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37868 + ... + 38180.

Almost surely, 2^11901512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11901512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13155030).

11901512 is an abundant number, since it is smaller than the sum of its proper divisors (14408548).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11901512 is a wasteful number, since it uses less digits than its factorization.

11901512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430 (or 419 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 20.

The square root of 11901512 is about 3449.8568086226. The cubic root of 11901512 is about 228.3147903791.

The spelling of 11901512 in words is "eleven million, nine hundred one thousand, five hundred twelve".