1457639 has 2 divisors, whose sum is σ = 1457640. Its totient is φ = 1457638.

The previous prime is 1457633. The next prime is 1457647. The reversal of 1457639 is 9367541.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1457639 - 2¹⁶ = 1392103 is a prime.

It is a super-2 number, since 2×1457639² = 4249422908642, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1457599 and 1457608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1457633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 728819 + 728820.

It is an arithmetic number, because the mean of its divisors is an integer number (728820).

2^1457639 is an apocalyptic number.

1457639 is a deficient number, since it is larger than the sum of its proper divisors (1).

1457639 is an equidigital number, since it uses as much as digits as its factorization.

1457639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22680, while the sum is 35.

The square root of 1457639 is about 1207.3272133105. The cubic root of 1457639 is about 113.3835350452.

The spelling of 1457639 in words is "one million, four hundred fifty-seven thousand, six hundred thirty-nine".