1420155771 has 8 divisors (see below), whose sum is σ = 1893721104. Its totient is φ = 946680480.

The previous prime is 1420155761. The next prime is 1420155799. The reversal of 1420155771 is 1775510241.

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

It is not a de Polignac number, because 1420155771 - 2¹⁸ = 1419893627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1420155721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36085 + ... + 64361.

It is an arithmetic number, because the mean of its divisors is an integer number (236715138).

Almost surely, 2^1420155771 is an apocalyptic number.

1420155771 is a deficient number, since it is larger than the sum of its proper divisors (473565333).

1420155771 is a wasteful number, since it uses less digits than its factorization.

1420155771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45021.

The product of its (nonzero) digits is 9800, while the sum is 33.

The square root of 1420155771 is about 37684.9541727199. The cubic root of 1420155771 is about 1124.0319629192.

The spelling of 1420155771 in words is "one billion, four hundred twenty million, one hundred fifty-five thousand, seven hundred seventy-one".