1401111240 has 128 divisors (see below), whose sum is σ = 4409856000. Its totient is φ = 355449600.

The previous prime is 1401111221. The next prime is 1401111259. The reversal of 1401111240 is 421111041.

It is an interprime number because it is at equal distance from previous prime (1401111221) and next prime (1401111259).

It is a super-2 number, since 2×1401111240² = 3926225413708675200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 547965 + ... + 550515.

It is an arithmetic number, because the mean of its divisors is an integer number (34452000).

Almost surely, 2^1401111240 is an apocalyptic number.

1401111240 is a gapful number since it is divisible by the number (10) 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 1401111240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2204928000).

1401111240 is an abundant number, since it is smaller than the sum of its proper divisors (3008744760).

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

1401111240 is a wasteful number, since it uses less digits than its factorization.

1401111240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2787 (or 2783 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 1401111240 is about 37431.4204913466. The cubic root of 1401111240 is about 1118.9848475900.

Adding to 1401111240 its reverse (421111041), we get a palindrome (1822222281).

The spelling of 1401111240 in words is "one billion, four hundred one million, one hundred eleven thousand, two hundred forty".