1401551420 has 12 divisors (see below), whose sum is σ = 2943258024. Its totient is φ = 560620560.

The previous prime is 1401551413. The next prime is 1401551443. The reversal of 1401551420 is 241551041.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35038766 + ... + 35038805.

It is an arithmetic number, because the mean of its divisors is an integer number (245271502).

Almost surely, 2^1401551420 is an apocalyptic number.

1401551420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1401551420 is an abundant number, since it is smaller than the sum of its proper divisors (1541706604).

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

1401551420 is a wasteful number, since it uses less digits than its factorization.

1401551420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70077580 (or 70077578 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 1401551420 is about 37437.2998492146. The cubic root of 1401551420 is about 1119.1020172488.

The spelling of 1401551420 in words is "one billion, four hundred one million, five hundred fifty-one thousand, four hundred twenty".