1222747542 has 32 divisors (see below), whose sum is σ = 2877055200. Its totient is φ = 383606784.

The previous prime is 1222747517. The next prime is 1222747549. The reversal of 1222747542 is 2457472221.

1222747542 is a `hidden beast` number, since 122 + 27 + 475 + 42 = 666.

It is a super-2 number, since 2×1222747542² = 2990223102934083528, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1222747497 and 1222747506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222747549) 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, 665067 + ... + 666902.

It is an arithmetic number, because the mean of its divisors is an integer number (89907975).

Almost surely, 2^1222747542 is an apocalyptic number.

1222747542 is an abundant number, since it is smaller than the sum of its proper divisors (1654307658).

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

1222747542 is a wasteful number, since it uses less digits than its factorization.

1222747542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1331997 (or 1331991 counting only the distinct ones).

The product of its digits is 62720, while the sum is 36.

The square root of 1222747542 is about 34967.8072232160. The cubic root of 1222747542 is about 1069.3312681689.

The spelling of 1222747542 in words is "one billion, two hundred twenty-two million, seven hundred forty-seven thousand, five hundred forty-two".