1421917545 has 16 divisors (see below), whose sum is σ = 2275780032. Its totient is φ = 758118720.

The previous prime is 1421917537. The next prime is 1421917547. The reversal of 1421917545 is 5457191241.

It is a happy number.

It is not a de Polignac number, because 1421917545 - 2³ = 1421917537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1421917547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41635 + ... + 67655.

It is an arithmetic number, because the mean of its divisors is an integer number (142236252).

Almost surely, 2^1421917545 is an apocalyptic number.

1421917545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1421917545 is a deficient number, since it is larger than the sum of its proper divisors (853862487).

1421917545 is a wasteful number, since it uses less digits than its factorization.

1421917545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29672.

The product of its digits is 50400, while the sum is 39.

The square root of 1421917545 is about 37708.3219594826. The cubic root of 1421917545 is about 1124.4965767334.

The spelling of 1421917545 in words is "one billion, four hundred twenty-one million, nine hundred seventeen thousand, five hundred forty-five".