142155451 has 4 divisors (see below), whose sum is σ = 142870000. Its totient is φ = 141440904.

The previous prime is 142155427. The next prime is 142155457. The reversal of 142155451 is 154551241.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 142155451 - 2⁹ = 142154939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142155457) 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, 356976 + ... + 357373.

It is an arithmetic number, because the mean of its divisors is an integer number (35717500).

Almost surely, 2^142155451 is an apocalyptic number.

142155451 is a deficient number, since it is larger than the sum of its proper divisors (714549).

142155451 is an equidigital number, since it uses as much as digits as its factorization.

142155451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714548.

The product of its digits is 4000, while the sum is 28.

The square root of 142155451 is about 11922.8960827477. The cubic root of 142155451 is about 521.9006517134.

The spelling of 142155451 in words is "one hundred forty-two million, one hundred fifty-five thousand, four hundred fifty-one".