1401523420 has 48 divisors (see below), whose sum is σ = 3258718848. Its totient is φ = 502032960.

The previous prime is 1401523411. The next prime is 1401523421. The reversal of 1401523420 is 243251041.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 1401523391 and 1401523400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401523421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32802 + ... + 62281.

It is an arithmetic number, because the mean of its divisors is an integer number (67889976).

Almost surely, 2^1401523420 is an apocalyptic number.

1401523420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1401523420 is an abundant number, since it is smaller than the sum of its proper divisors (1857195428).

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

1401523420 is a wasteful number, since it uses less digits than its factorization.

1401523420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95170 (or 95168 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 1401523420 is about 37436.9258887532. The cubic root of 1401523420 is about 1119.0945647775.

Adding to 1401523420 its reverse (243251041), we get a palindrome (1644774461).

The spelling of 1401523420 in words is "one billion, four hundred one million, five hundred twenty-three thousand, four hundred twenty".