131045420 has 36 divisors (see below), whose sum is σ = 302493072. Its totient is φ = 47652000.

The previous prime is 131045419. The next prime is 131045423. The reversal of 131045420 is 24540131.

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 = 131045392 and 131045401.

It is not an unprimeable number, because it can be changed into a prime (131045423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24656 + ... + 29495.

Almost surely, 2^131045420 is an apocalyptic number.

131045420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131045420 is an abundant number, since it is smaller than the sum of its proper divisors (171447652).

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

131045420 is a wasteful number, since it uses less digits than its factorization.

131045420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54182 (or 54169 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 131045420 is about 11447.5071522144. The cubic root of 131045420 is about 507.9339974596.

Adding to 131045420 its reverse (24540131), we get a palindrome (155585551).

The spelling of 131045420 in words is "one hundred thirty-one million, forty-five thousand, four hundred twenty".