125001015542 has 16 divisors (see below), whose sum is σ = 212552334960. Its totient is φ = 54656314272.

The previous prime is 125001015541. The next prime is 125001015547. The reversal of 125001015542 is 245510100521.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125001015541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126518753 + ... + 126519740.

It is an arithmetic number, because the mean of its divisors is an integer number (13284520935).

Almost surely, 2^125001015542 is an apocalyptic number.

125001015542 is a deficient number, since it is larger than the sum of its proper divisors (87551319418).

125001015542 is a wasteful number, since it uses less digits than its factorization.

125001015542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253038527.

The product of its (nonzero) digits is 2000, while the sum is 26.

The spelling of 125001015542 in words is "one hundred twenty-five billion, one million, fifteen thousand, five hundred forty-two".