1203123240 has 128 divisors (see below), whose sum is σ = 4375036800. Its totient is φ = 291663360.

The previous prime is 1203123217. The next prime is 1203123241. The reversal of 1203123240 is 423213021.

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

It is not an unprimeable number, because it can be changed into a prime (1203123241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38757 + ... + 62516.

It is an arithmetic number, because the mean of its divisors is an integer number (34179975).

Almost surely, 2^1203123240 is an apocalyptic number.

1203123240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1203123240 is an abundant number, since it is smaller than the sum of its proper divisors (3171913560).

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

1203123240 is a wasteful number, since it uses less digits than its factorization.

1203123240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101304 (or 101294 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1203123240 is about 34686.0669433708. The cubic root of 1203123240 is about 1063.5796976565.

Adding to 1203123240 its reverse (423213021), we get a palindrome (1626336261).

The spelling of 1203123240 in words is "one billion, two hundred three million, one hundred twenty-three thousand, two hundred forty".