1220461 has 4 divisors (see below), whose sum is σ = 1331424. Its totient is φ = 1109500.

The previous prime is 1220437. The next prime is 1220489. The reversal of 1220461 is 1640221.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1640221 = 11 ⋅149111.

It is a cyclic number.

It is not a de Polignac number, because 1220461 - 2⁷ = 1220333 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55465 + ... + 55486.

It is an arithmetic number, because the mean of its divisors is an integer number (332856).

2^1220461 is an apocalyptic number.

1220461 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1220461 is a deficient number, since it is larger than the sum of its proper divisors (110963).

1220461 is a wasteful number, since it uses less digits than its factorization.

1220461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110962.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1220461 is about 1104.7447669032. The cubic root of 1220461 is about 106.8664301235.

Adding to 1220461 its reverse (1640221), we get a palindrome (2860682).

It can be divided in two parts, 1220 and 461, that added together give a square (1681 = 41²).

The spelling of 1220461 in words is "one million, two hundred twenty thousand, four hundred sixty-one".