142780901 has 4 divisors (see below), whose sum is σ = 146263404. Its totient is φ = 139298400.

The previous prime is 142780873. The next prime is 142780933. The reversal of 142780901 is 109087241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 109087241 = 29 ⋅3761629.

It can be written as a sum of positive squares in 2 ways, for example, as 40972801 + 101808100 = 6401^2 + 10090^2 .

It is a cyclic number.

It is not a de Polignac number, because 142780901 - 2⁶ = 142780837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142780201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1741190 + ... + 1741271.

It is an arithmetic number, because the mean of its divisors is an integer number (36565851).

Almost surely, 2^142780901 is an apocalyptic number.

It is an amenable number.

142780901 is a deficient number, since it is larger than the sum of its proper divisors (3482503).

142780901 is an equidigital number, since it uses as much as digits as its factorization.

142780901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3482502.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 142780901 is about 11949.0962419758. The cubic root of 142780901 is about 522.6649446047.

It can be divided in two parts, 1427 and 80901, that added together give a palindrome (82328).

The spelling of 142780901 in words is "one hundred forty-two million, seven hundred eighty thousand, nine hundred one".