1221453162 has 32 divisors (see below), whose sum is σ = 2874009600. Its totient is φ = 383200704.

The previous prime is 1221453143. The next prime is 1221453169. The reversal of 1221453162 is 2613541221.

1221453162 is a `hidden beast` number, since 122 + 1 + 4 + 531 + 6 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1221453169) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 664362 + ... + 666197.

It is an arithmetic number, because the mean of its divisors is an integer number (89812800).

Almost surely, 2^1221453162 is an apocalyptic number.

1221453162 is an abundant number, since it is smaller than the sum of its proper divisors (1652556438).

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

1221453162 is a wasteful number, since it uses less digits than its factorization.

1221453162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1330587 (or 1330581 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 1221453162 is about 34949.2941559626. The cubic root of 1221453162 is about 1068.9538095769.

Adding to 1221453162 its reverse (2613541221), we get a palindrome (3834994383).

The spelling of 1221453162 in words is "one billion, two hundred twenty-one million, four hundred fifty-three thousand, one hundred sixty-two".