1540000451 has 4 divisors (see below), whose sum is σ = 1680000504. Its totient is φ = 1400000400.

The previous prime is 1540000447. The next prime is 1540000493.

1540000451 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1540000451 - 2² = 1540000447 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1540000411) 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, 70000010 + ... + 70000031.

It is an arithmetic number, because the mean of its divisors is an integer number (420000126).

Almost surely, 2^1540000451 is an apocalyptic number.

1540000451 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1540000451 is a deficient number, since it is larger than the sum of its proper divisors (140000053).

1540000451 is a wasteful number, since it uses less digits than its factorization.

1540000451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140000052.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 1540000451 is about 39242.8394869688. The cubic root of 1540000451 is about 1154.8004630220.

It can be divided in two parts, 1540000 and 451, that added together give a palindrome (1540451).

The spelling of 1540000451 in words is "one billion, five hundred forty million, four hundred fifty-one", and thus it is an aban number.