1042123220 has 24 divisors (see below), whose sum is σ = 2194101000. Its totient is φ = 415774592.

The previous prime is 1042123219. The next prime is 1042123289. The reversal of 1042123220 is 223212401.

It can be written as a sum of positive squares in 4 ways, for example, as 78889924 + 963233296 = 8882^2 + 31036^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59195 + ... + 74754.

It is an arithmetic number, because the mean of its divisors is an integer number (91420875).

Almost surely, 2^1042123220 is an apocalyptic number.

1042123220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1042123220 is an abundant number, since it is smaller than the sum of its proper divisors (1151977780).

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

1042123220 is a wasteful number, since it uses less digits than its factorization.

1042123220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134347 (or 134345 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1042123220 is about 32281.9333373948. The cubic root of 1042123220 is about 1013.8484096091.

Adding to 1042123220 its reverse (223212401), we get a palindrome (1265335621).

The spelling of 1042123220 in words is "one billion, forty-two million, one hundred twenty-three thousand, two hundred twenty".