1401355242 has 128 divisors (see below), whose sum is σ = 3703303680. Its totient is φ = 389251008.

The previous prime is 1401355223. The next prime is 1401355289. The reversal of 1401355242 is 2425531041.

1401355242 is a `hidden beast` number, since 1 + 4 + 0 + 135 + 524 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1132248 + ... + 1133484.

It is an arithmetic number, because the mean of its divisors is an integer number (28932060).

Almost surely, 2^1401355242 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1401355242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1851651840).

1401355242 is an abundant number, since it is smaller than the sum of its proper divisors (2301948438).

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

1401355242 is an equidigital number, since it uses as much as digits as its factorization.

1401355242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1304 (or 1286 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 1401355242 is about 37434.6796700600. The cubic root of 1401355242 is about 1119.0498004847.

Adding to 1401355242 its reverse (2425531041), we get a palindrome (3826886283).

The spelling of 1401355242 in words is "one billion, four hundred one million, three hundred fifty-five thousand, two hundred forty-two".