145215542 has 16 divisors (see below), whose sum is σ = 221266512. Its totient is φ = 71464320.

The previous prime is 145215533. The next prime is 145215607. The reversal of 145215542 is 245512541.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110453 + ... + 111759.

It is an arithmetic number, because the mean of its divisors is an integer number (13829157).

Almost surely, 2^145215542 is an apocalyptic number.

145215542 is a deficient number, since it is larger than the sum of its proper divisors (76050970).

145215542 is a wasteful number, since it uses less digits than its factorization.

145215542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2143.

The product of its digits is 8000, while the sum is 29.

The square root of 145215542 is about 12050.5411496746. The cubic root of 145215542 is about 525.6189730453.

The spelling of 145215542 in words is "one hundred forty-five million, two hundred fifteen thousand, five hundred forty-two".