1242134776 has 16 divisors (see below), whose sum is σ = 2361806640. Its totient is φ = 612319680.

The previous prime is 1242134771. The next prime is 1242134797. The reversal of 1242134776 is 6774312421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242134771) 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, 1092861 + ... + 1093996.

It is an arithmetic number, because the mean of its divisors is an integer number (147612915).

Almost surely, 2^1242134776 is an apocalyptic number.

It is an amenable number.

1242134776 is a deficient number, since it is larger than the sum of its proper divisors (1119671864).

1242134776 is a wasteful number, since it uses less digits than its factorization.

1242134776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2186934 (or 2186930 counting only the distinct ones).

The product of its digits is 56448, while the sum is 37.

The square root of 1242134776 is about 35243.9324707105. The cubic root of 1242134776 is about 1074.9532414492.

The spelling of 1242134776 in words is "one billion, two hundred forty-two million, one hundred thirty-four thousand, seven hundred seventy-six".