1212961 has 4 divisors (see below), whose sum is σ = 1216512. Its totient is φ = 1209412.

The previous prime is 1212943. The next prime is 1212973. The reversal of 1212961 is 1692121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212961 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1201 + ... + 1966.

It is an arithmetic number, because the mean of its divisors is an integer number (304128).

2^1212961 is an apocalyptic number.

It is an amenable number.

1212961 is a deficient number, since it is larger than the sum of its proper divisors (3551).

1212961 is an equidigital number, since it uses as much as digits as its factorization.

1212961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3550.

The product of its digits is 216, while the sum is 22.

The square root of 1212961 is about 1101.3450867008. The cubic root of 1212961 is about 106.6470743095.

It can be divided in two parts, 121 and 2961, that multiplied together give a triangular number (358281 = T₈₄₆).

The spelling of 1212961 in words is "one million, two hundred twelve thousand, nine hundred sixty-one".