1283998155 has 24 divisors (see below), whose sum is σ = 2258142096. Its totient is φ = 622543680.

The previous prime is 1283998147. The next prime is 1283998159. The reversal of 1283998155 is 5518993821.

It is not a de Polignac number, because 1283998155 - 2³ = 1283998147 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1283998098 and 1283998107.

It is not an unprimeable number, because it can be changed into a prime (1283998159) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 351904 + ... + 355533.

It is an arithmetic number, because the mean of its divisors is an integer number (94089254).

Almost surely, 2^1283998155 is an apocalyptic number.

1283998155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1283998155 is a deficient number, since it is larger than the sum of its proper divisors (974143941).

1283998155 is a wasteful number, since it uses less digits than its factorization.

1283998155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707467 (or 707456 counting only the distinct ones).

The product of its digits is 777600, while the sum is 51.

The square root of 1283998155 is about 35832.9199898641. The cubic root of 1283998155 is about 1086.8963572933.

The spelling of 1283998155 in words is "one billion, two hundred eighty-three million, nine hundred ninety-eight thousand, one hundred fifty-five".