1000621457 has 4 divisors (see below), whose sum is σ = 1091587056. Its totient is φ = 909655860.

The previous prime is 1000621409. The next prime is 1000621459. The reversal of 1000621457 is 7541260001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7541260001 = 11 ⋅685569091.

It is a cyclic number.

It is not a de Polignac number, because 1000621457 - 2⁸ = 1000621201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1000621459) 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, 45482783 + ... + 45482804.

It is an arithmetic number, because the mean of its divisors is an integer number (272896764).

Almost surely, 2^1000621457 is an apocalyptic number.

It is an amenable number.

1000621457 is a deficient number, since it is larger than the sum of its proper divisors (90965599).

1000621457 is an equidigital number, since it uses as much as digits as its factorization.

1000621457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90965598.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 1000621457 is about 31632.6011734729. The cubic root of 1000621457 is about 1000.2071094361.

Adding to 1000621457 its reverse (7541260001), we get a palindrome (8541881458).

The spelling of 1000621457 in words is "one billion, six hundred twenty-one thousand, four hundred fifty-seven".