1403021457 has 6 divisors (see below), whose sum is σ = 2026586562. Its totient is φ = 935347632.

The previous prime is 1403021449. The next prime is 1403021489. The reversal of 1403021457 is 7541203041.

It can be written as a sum of positive squares in only one way, i.e., 724471056 + 678550401 = 26916^2 + 26049^2 .

It is not a de Polignac number, because 1403021457 - 2³ = 1403021449 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1403021457.

It is not an unprimeable number, because it can be changed into a prime (1403021437) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 77945628 + ... + 77945645.

It is an arithmetic number, because the mean of its divisors is an integer number (337764427).

Almost surely, 2^1403021457 is an apocalyptic number.

It is an amenable number.

1403021457 is a deficient number, since it is larger than the sum of its proper divisors (623565105).

1403021457 is a wasteful number, since it uses less digits than its factorization.

1403021457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155891279 (or 155891276 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 1403021457 is about 37456.9280240652. The cubic root of 1403021457 is about 1119.4931425200.

Adding to 1403021457 its reverse (7541203041), we get a palindrome (8944224498).

The spelling of 1403021457 in words is "one billion, four hundred three million, twenty-one thousand, four hundred fifty-seven".