1157420 has 24 divisors (see below), whose sum is σ = 2652048. Its totient is φ = 420800.

The previous prime is 1157413. The next prime is 1157437. The reversal of 1157420 is 247511.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1157392 and 1157401.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2411 + ... + 2850.

It is an arithmetic number, because the mean of its divisors is an integer number (110502).

2^1157420 is an apocalyptic number.

1157420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1157420 is an abundant number, since it is smaller than the sum of its proper divisors (1494628).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1157420 is a wasteful number, since it uses less digits than its factorization.

1157420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5281 (or 5279 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 1157420 is about 1075.8345597721. The cubic root of 1157420 is about 104.9938015993.

Subtracting from 1157420 its reverse (247511), we obtain a palindrome (909909).

The spelling of 1157420 in words is "one million, one hundred fifty-seven thousand, four hundred twenty".