1216715742 has 60 divisors (see below), whose sum is σ = 2996774088. Its totient is φ = 368695800.

The previous prime is 1216715719. The next prime is 1216715761. The reversal of 1216715742 is 2475176121.

1216715742 is a `hidden beast` number, since 1 + 2 + 16 + 71 + 574 + 2 = 666.

It is a super-2 number, since 2×1216715742² = 2960794393661221128, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1216715697 and 1216715706.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 11434 + ... + 50637.

Almost surely, 2^1216715742 is an apocalyptic number.

1216715742 is an abundant number, since it is smaller than the sum of its proper divisors (1780058346).

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

1216715742 is a wasteful number, since it uses less digits than its factorization.

1216715742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62107 (or 62087 counting only the distinct ones).

The product of its digits is 23520, while the sum is 36.

The square root of 1216715742 is about 34881.4526933727. The cubic root of 1216715742 is about 1067.5700358630.

The spelling of 1216715742 in words is "one billion, two hundred sixteen million, seven hundred fifteen thousand, seven hundred forty-two".