142621155 has 40 divisors (see below), whose sum is σ = 257404752. Its totient is φ = 75546432.

The previous prime is 142621139. The next prime is 142621181. The reversal of 142621155 is 551126241.

It is not a de Polignac number, because 142621155 - 2⁴ = 142621139 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 62464 + ... + 64706.

Almost surely, 2^142621155 is an apocalyptic number.

142621155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

142621155 is a deficient number, since it is larger than the sum of its proper divisors (114783597).

142621155 is a wasteful number, since it uses less digits than its factorization.

142621155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2417 (or 2408 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 142621155 is about 11942.4099326727. The cubic root of 142621155 is about 522.4699493565.

Adding to 142621155 its reverse (551126241), we get a palindrome (693747396).

The spelling of 142621155 in words is "one hundred forty-two million, six hundred twenty-one thousand, one hundred fifty-five".