1340021511534 has 16 divisors (see below), whose sum is σ = 2680112972880. Its totient is φ = 446662178880.

The previous prime is 1340021511529. The next prime is 1340021511547. The reversal of 1340021511534 is 4351151200431.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2663877 + ... + 3126704.

It is an arithmetic number, because the mean of its divisors is an integer number (167507060805).

Almost surely, 2^{1340021511534} is an apocalyptic number.

1340021511534 is an abundant number, since it is smaller than the sum of its proper divisors (1340091461346).

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

1340021511534 is a wasteful number, since it uses less digits than its factorization.

1340021511534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5829155.

The product of its (nonzero) digits is 7200, while the sum is 30.

Adding to 1340021511534 its reverse (4351151200431), we get a palindrome (5691172711965).

The spelling of 1340021511534 in words is "one trillion, three hundred forty billion, twenty-one million, five hundred eleven thousand, five hundred thirty-four".