125534734721 has 8 divisors (see below), whose sum is σ = 136961292000. Its totient is φ = 114110562240.

The previous prime is 125534734697. The next prime is 125534734733. The reversal of 125534734721 is 127437435521.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 125534734721 - 2²² = 125530540417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125534734921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 485231 + ... + 697508.

It is an arithmetic number, because the mean of its divisors is an integer number (17120161500).

Almost surely, 2^125534734721 is an apocalyptic number.

125534734721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

125534734721 is a deficient number, since it is larger than the sum of its proper divisors (11426557279).

125534734721 is a wasteful number, since it uses less digits than its factorization.

125534734721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1192399.

The product of its digits is 705600, while the sum is 44.

The spelling of 125534734721 in words is "one hundred twenty-five billion, five hundred thirty-four million, seven hundred thirty-four thousand, seven hundred twenty-one".