1221754146 has 16 divisors (see below), whose sum is σ = 2443864800. Its totient is φ = 407191968.

The previous prime is 1221754117. The next prime is 1221754187. The reversal of 1221754146 is 6414571221.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54885 + ... + 73863.

It is an arithmetic number, because the mean of its divisors is an integer number (152741550).

Almost surely, 2^1221754146 is an apocalyptic number.

1221754146 is an abundant number, since it is smaller than the sum of its proper divisors (1222110654).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1221754146 is a wasteful number, since it uses less digits than its factorization.

1221754146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29713.

The product of its digits is 13440, while the sum is 33.

The square root of 1221754146 is about 34953.5999004394. The cubic root of 1221754146 is about 1069.0416043392.

The spelling of 1221754146 in words is "one billion, two hundred twenty-one million, seven hundred fifty-four thousand, one hundred forty-six".