1214397511740 has 384 divisors, whose sum is σ = 4373447178240. Its totient is φ = 274019328000.

The previous prime is 1214397511721. The next prime is 1214397511753. The reversal of 1214397511740 is 471157934121.

1214397511740 is a `hidden beast` number, since 1 + 2 + 1 + 4 + 3 + 97 + 511 + 7 + 40 = 666.

It is a super-2 number, since 2×1214397511740² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 134763835 + ... + 134772845.

It is an arithmetic number, because the mean of its divisors is an integer number (11389185360).

Almost surely, 2^{1214397511740} is an apocalyptic number.

1214397511740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1214397511740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2186723589120).

1214397511740 is an abundant number, since it is smaller than the sum of its proper divisors (3159049666500).

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

1214397511740 is a wasteful number, since it uses less digits than its factorization.

1214397511740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9490 (or 9482 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 45.

The spelling of 1214397511740 in words is "one trillion, two hundred fourteen billion, three hundred ninety-seven million, five hundred eleven thousand, seven hundred forty".