142903905 has 16 divisors (see below), whose sum is σ = 230746560. Its totient is φ = 75515328.

The previous prime is 142903903. The next prime is 142903927. The reversal of 142903905 is 509309241.

It is not a de Polignac number, because 142903905 - 2¹ = 142903903 is a prime.

It is not an unprimeable number, because it can be changed into a prime (142903903) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42067 + ... + 45336.

It is an arithmetic number, because the mean of its divisors is an integer number (14421660).

Almost surely, 2^142903905 is an apocalyptic number.

142903905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

142903905 is a deficient number, since it is larger than the sum of its proper divisors (87842655).

142903905 is a wasteful number, since it uses less digits than its factorization.

142903905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87520.

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 142903905 is about 11954.2421340711. The cubic root of 142903905 is about 522.8149913443.

The spelling of 142903905 in words is "one hundred forty-two million, nine hundred three thousand, nine hundred five".