1557420601 has 8 divisors (see below), whose sum is σ = 1699324704. Its totient is φ = 1415569920.

The previous prime is 1557420583. The next prime is 1557420619. The reversal of 1557420601 is 1060247551.

It is an interprime number because it is at equal distance from previous prime (1557420583) and next prime (1557420619).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1557420601 - 2¹¹ = 1557418553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1557420401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70566 + ... + 89968.

It is an arithmetic number, because the mean of its divisors is an integer number (212415588).

Almost surely, 2^1557420601 is an apocalyptic number.

1557420601 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1557420601 is a deficient number, since it is larger than the sum of its proper divisors (141904103).

1557420601 is a wasteful number, since it uses less digits than its factorization.

1557420601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26711.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 1557420601 is about 39464.1685709961. The cubic root of 1557420601 is about 1159.1384310424.

The spelling of 1557420601 in words is "one billion, five hundred fifty-seven million, four hundred twenty thousand, six hundred one".