1210125420 has 336 divisors, whose sum is σ = 4442231808. Its totient is φ = 271071360.

The previous prime is 1210125419. The next prime is 1210125431. The reversal of 1210125420 is 245210121.

1210125420 is a `hidden beast` number, since 121 + 0 + 1 + 2 + 542 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1210125393 and 1210125402.

It is an unprimeable number.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 7246177 + ... + 7246343.

It is an arithmetic number, because the mean of its divisors is an integer number (13220928).

Almost surely, 2^1210125420 is an apocalyptic number.

1210125420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1210125420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2221115904).

1210125420 is an abundant number, since it is smaller than the sum of its proper divisors (3232106388).

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

1210125420 is a wasteful number, since it uses less digits than its factorization.

1210125420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272 (or 255 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 1210125420 is about 34786.8570008847. The cubic root of 1210125420 is about 1065.6390530793.

Adding to 1210125420 its reverse (245210121), we get a palindrome (1455335541).

The spelling of 1210125420 in words is "one billion, two hundred ten million, one hundred twenty-five thousand, four hundred twenty".