155494001 has 8 divisors (see below), whose sum is σ = 171018624. Its totient is φ = 140478480.

The previous prime is 155493991. The next prime is 155494021. The reversal of 155494001 is 100494551.

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 155494001 - 2²⁶ = 88385137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155494021) 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, 126635 + ... + 127856.

It is an arithmetic number, because the mean of its divisors is an integer number (21377328).

Almost surely, 2^155494001 is an apocalyptic number.

It is an amenable number.

155494001 is a deficient number, since it is larger than the sum of its proper divisors (15524623).

155494001 is a wasteful number, since it uses less digits than its factorization.

155494001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254551.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 155494001 is about 12469.7233730344. The cubic root of 155494001 is about 537.7386008278.

The spelling of 155494001 in words is "one hundred fifty-five million, four hundred ninety-four thousand, one".