1242220454 has 8 divisors (see below), whose sum is σ = 1864090368. Its totient is φ = 620857000.

The previous prime is 1242220453. The next prime is 1242220457. The reversal of 1242220454 is 4540222421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1242220454² = 3086223312671932232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242220453) 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, 120422 + ... + 130329.

It is an arithmetic number, because the mean of its divisors is an integer number (233011296).

Almost surely, 2^1242220454 is an apocalyptic number.

1242220454 is a deficient number, since it is larger than the sum of its proper divisors (621869914).

1242220454 is a wasteful number, since it uses less digits than its factorization.

1242220454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253230.

The product of its (nonzero) digits is 5120, while the sum is 26.

The square root of 1242220454 is about 35245.1479497533. The cubic root of 1242220454 is about 1074.9779563535.

Adding to 1242220454 its reverse (4540222421), we get a palindrome (5782442875).

The spelling of 1242220454 in words is "one billion, two hundred forty-two million, two hundred twenty thousand, four hundred fifty-four".