1401200520 has 64 divisors (see below), whose sum is σ = 4450878720. Its totient is φ = 351673344.

The previous prime is 1401200509. The next prime is 1401200531. The reversal of 1401200520 is 250021041.

It is an interprime number because it is at equal distance from previous prime (1401200509) and next prime (1401200531).

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

It is a self number, because there is not a number n which added to its sum of digits gives 1401200520.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 341392 + ... + 345471.

It is an arithmetic number, because the mean of its divisors is an integer number (69544980).

Almost surely, 2^1401200520 is an apocalyptic number.

1401200520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1401200520 is an abundant number, since it is smaller than the sum of its proper divisors (3049678200).

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

1401200520 is a wasteful number, since it uses less digits than its factorization.

1401200520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686894 (or 686890 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 1401200520 is about 37432.6130533256. The cubic root of 1401200520 is about 1119.0086146406.

Adding to 1401200520 its reverse (250021041), we get a palindrome (1651221561).

The spelling of 1401200520 in words is "one billion, four hundred one million, two hundred thousand, five hundred twenty".