1540214120 has 16 divisors (see below), whose sum is σ = 3465481860. Its totient is φ = 616085632.

The previous prime is 1540214089. The next prime is 1540214173. The reversal of 1540214120 is 214120451.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1467043204 + 73170916 = 38302^2 + 8554^2 .

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 = 1540214092 and 1540214101.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19252637 + ... + 19252716.

Almost surely, 2^1540214120 is an apocalyptic number.

1540214120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1540214120 is an abundant number, since it is smaller than the sum of its proper divisors (1925267740).

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

1540214120 is a wasteful number, since it uses less digits than its factorization.

1540214120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38505364 (or 38505360 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 1540214120 is about 39245.5617872900. The cubic root of 1540214120 is about 1154.8538685582.

Adding to 1540214120 its reverse (214120451), we get a palindrome (1754334571).

The spelling of 1540214120 in words is "one billion, five hundred forty million, two hundred fourteen thousand, one hundred twenty".