11401572 has 96 divisors (see below), whose sum is σ = 33530112. Its totient is φ = 2935296.

The previous prime is 11401561. The next prime is 11401601. The reversal of 11401572 is 27510411.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57778 + ... + 57974.

It is an arithmetic number, because the mean of its divisors is an integer number (349272).

Almost surely, 2^11401572 is an apocalyptic number.

11401572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11401572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16765056).

11401572 is an abundant number, since it is smaller than the sum of its proper divisors (22128540).

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

11401572 is a wasteful number, since it uses less digits than its factorization.

11401572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277 (or 275 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 21.

The square root of 11401572 is about 3376.6213883111. The cubic root of 11401572 is about 225.0720559341.

Adding to 11401572 its reverse (27510411), we get a palindrome (38911983).

The spelling of 11401572 in words is "eleven million, four hundred one thousand, five hundred seventy-two".