125802154987 has 4 divisors (see below), whose sum is σ = 125803468656. Its totient is φ = 125800841320.

The previous prime is 125802154921. The next prime is 125802154997. The reversal of 125802154987 is 789451208521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 789451208521 = 971 ⋅813029051.

It is a cyclic number.

It is not a de Polignac number, because 125802154987 - 2²³ = 125793766379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125802154997) 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, 500839 + ... + 708832.

It is an arithmetic number, because the mean of its divisors is an integer number (31450867164).

Almost surely, 2^125802154987 is an apocalyptic number.

125802154987 is a deficient number, since it is larger than the sum of its proper divisors (1313669).

125802154987 is a wasteful number, since it uses less digits than its factorization.

125802154987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1313668.

The product of its (nonzero) digits is 1612800, while the sum is 52.

The spelling of 125802154987 in words is "one hundred twenty-five billion, eight hundred two million, one hundred fifty-four thousand, nine hundred eighty-seven".