1212125 has 8 divisors (see below), whose sum is σ = 1512888. Its totient is φ = 969600.

The previous prime is 1212121. The next prime is 1212149. The reversal of 1212125 is 5212121.

1212125 = 778² + 779².

It can be written as a sum of positive squares in 4 ways, for example, as 206116 + 1006009 = 454^2 + 1003^2 .

It is not a de Polignac number, because 1212125 - 2² = 1212121 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4724 + ... + 4973.

It is an arithmetic number, because the mean of its divisors is an integer number (189111).

2^1212125 is an apocalyptic number.

1212125 is the 779-th centered square number.

It is an amenable number.

1212125 is a deficient number, since it is larger than the sum of its proper divisors (300763).

1212125 is an frugal number, since it uses more digits than its factorization.

1212125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9712 (or 9702 counting only the distinct ones).

The product of its digits is 40, while the sum is 14.

The square root of 1212125 is about 1100.9654853809. The cubic root of 1212125 is about 106.6225674911.

Adding to 1212125 its reverse (5212121), we get a palindrome (6424246).

The spelling of 1212125 in words is "one million, two hundred twelve thousand, one hundred twenty-five".