145121421506 has 16 divisors (see below), whose sum is σ = 232686736128. Its totient is φ = 67713069600.

The previous prime is 145121421503. The next prime is 145121421551. The reversal of 145121421506 is 605124121541.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (145121421503) 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, 38471450 + ... + 38475221.

It is an arithmetic number, because the mean of its divisors is an integer number (14542921008).

Almost surely, 2^145121421506 is an apocalyptic number.

145121421506 is a deficient number, since it is larger than the sum of its proper divisors (87565314622).

145121421506 is a wasteful number, since it uses less digits than its factorization.

145121421506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76946737.

The product of its (nonzero) digits is 9600, while the sum is 32.

The spelling of 145121421506 in words is "one hundred forty-five billion, one hundred twenty-one million, four hundred twenty-one thousand, five hundred six".