1001551459 has 4 divisors (see below), whose sum is σ = 1015271416. Its totient is φ = 987831504.

The previous prime is 1001551457. The next prime is 1001551469. The reversal of 1001551459 is 9541551001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9541551001 = 7549 ⋅1263949.

It is a cyclic number.

It is not a de Polignac number, because 1001551459 - 2¹ = 1001551457 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1001551459.

It is not an unprimeable number, because it can be changed into a prime (1001551457) 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, 6859869 + ... + 6860014.

It is an arithmetic number, because the mean of its divisors is an integer number (253817854).

Almost surely, 2^1001551459 is an apocalyptic number.

1001551459 is a deficient number, since it is larger than the sum of its proper divisors (13719957).

1001551459 is an equidigital number, since it uses as much as digits as its factorization.

1001551459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13719956.

The product of its (nonzero) digits is 4500, while the sum is 31.

The square root of 1001551459 is about 31647.2978151374. The cubic root of 1001551459 is about 1000.5168857831.

The spelling of 1001551459 in words is "one billion, one million, five hundred fifty-one thousand, four hundred fifty-nine".