1201550420 has 48 divisors (see below), whose sum is σ = 2890556928. Its totient is φ = 410983680.

The previous prime is 1201550411. The next prime is 1201550437. The reversal of 1201550420 is 240551021.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1201550392 and 1201550401.

It is a congruent number.

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, 50384 + ... + 70296.

It is an arithmetic number, because the mean of its divisors is an integer number (60219936).

Almost surely, 2^1201550420 is an apocalyptic number.

1201550420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201550420 is an abundant number, since it is smaller than the sum of its proper divisors (1689006508).

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

1201550420 is a wasteful number, since it uses less digits than its factorization.

1201550420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20360 (or 20358 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 1201550420 is about 34663.3873128406. The cubic root of 1201550420 is about 1063.1160297510.

The spelling of 1201550420 in words is "one billion, two hundred one million, five hundred fifty thousand, four hundred twenty".