142977405 has 8 divisors (see below), whose sum is σ = 228763872. Its totient is φ = 76254608.

The previous prime is 142977383. The next prime is 142977409. The reversal of 142977405 is 504779241.

142977405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 142977405 - 2⁷ = 142977277 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142977409) 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, 4765899 + ... + 4765928.

It is an arithmetic number, because the mean of its divisors is an integer number (28595484).

Almost surely, 2^142977405 is an apocalyptic number.

142977405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

142977405 is a deficient number, since it is larger than the sum of its proper divisors (85786467).

142977405 is an equidigital number, since it uses as much as digits as its factorization.

142977405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9531835.

The product of its (nonzero) digits is 70560, while the sum is 39.

The square root of 142977405 is about 11957.3159613686. The cubic root of 142977405 is about 522.9046094125.

The spelling of 142977405 in words is "one hundred forty-two million, nine hundred seventy-seven thousand, four hundred five".