1212045 has 8 divisors (see below), whose sum is σ = 1939296. Its totient is φ = 646416.

The previous prime is 1212023. The next prime is 1212047. The reversal of 1212045 is 5402121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1212045 - 2⁸ = 1211789 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 80803 = 1212045 / (1 + 2 + 1 + 2 + 0 + 4 + 5).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212047) 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, 40387 + ... + 40416.

It is an arithmetic number, because the mean of its divisors is an integer number (242412).

2^1212045 is an apocalyptic number.

1212045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1212045 is a deficient number, since it is larger than the sum of its proper divisors (727251).

1212045 is an equidigital number, since it uses as much as digits as its factorization.

1212045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80811.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 1212045 is about 1100.9291530339. The cubic root of 1212045 is about 106.6202217503.

Adding to 1212045 its reverse (5402121), we get a palindrome (6614166).

The spelling of 1212045 in words is "one million, two hundred twelve thousand, forty-five".