1284156401 has 16 divisors (see below), whose sum is σ = 1538749440. Its totient is φ = 1057882320.

The previous prime is 1284156383. The next prime is 1284156403. The reversal of 1284156401 is 1046514821.

It is not a de Polignac number, because 1284156401 - 2²² = 1279962097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1284156403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128765 + ... + 138378.

It is an arithmetic number, because the mean of its divisors is an integer number (96171840).

Almost surely, 2^1284156401 is an apocalyptic number.

1284156401 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1284156401 is a deficient number, since it is larger than the sum of its proper divisors (254593039).

1284156401 is a wasteful number, since it uses less digits than its factorization.

1284156401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267196.

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 1284156401 is about 35835.1280310256. The cubic root of 1284156401 is about 1086.9410068734.

The spelling of 1284156401 in words is "one billion, two hundred eighty-four million, one hundred fifty-six thousand, four hundred one".