1220992 has 16 divisors (see below), whose sum is σ = 2432700. Its totient is φ = 610432.

The previous prime is 1220983. The next prime is 1220993. The reversal of 1220992 is 2990221.

It is a tau number, because it is divible by the number of its divisors (16).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4642 + ... + 4897.

2^1220992 is an apocalyptic number.

It is an amenable number.

1220992 is a deficient number, since it is larger than the sum of its proper divisors (1211708).

1220992 is an frugal number, since it uses more digits than its factorization.

1220992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9553 (or 9541 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 1220992 is about 1104.9850677724. The cubic root of 1220992 is about 106.8819264118.

The spelling of 1220992 in words is "one million, two hundred twenty thousand, nine hundred ninety-two".