1248148561 has 8 divisors (see below), whose sum is σ = 1381940064. Its totient is φ = 1117744320.

The previous prime is 1248148553. The next prime is 1248148579. The reversal of 1248148561 is 1658418421.

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

It is not a de Polignac number, because 1248148561 - 2³ = 1248148553 is a prime.

It is a super-3 number, since 3×1248148561³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1248148261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 846040 + ... + 847513.

It is an arithmetic number, because the mean of its divisors is an integer number (172742508).

Almost surely, 2^1248148561 is an apocalyptic number.

1248148561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1248148561 is a deficient number, since it is larger than the sum of its proper divisors (133791503).

1248148561 is a wasteful number, since it uses less digits than its factorization.

1248148561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1693631.

The product of its digits is 61440, while the sum is 40.

The square root of 1248148561 is about 35329.1460553464. The cubic root of 1248148561 is about 1076.6852416331.

The spelling of 1248148561 in words is "one billion, two hundred forty-eight million, one hundred forty-eight thousand, five hundred sixty-one".